I've obtained a new 700c Copenhagen e-assist wheel at a pretty nice price, which I anticipate selling to an interested party at some point...  however, I'm going to put it through its paces first on my SprintX trike, to evaluate battery life, assist feel, etc. over the next few weeks (weather cooperating), and document my findings and impressions, here.
 
The wheel itself (with cassette) weighs just under 20 pounds -- came with a 10-speed cassette, and it fit just fine onto the trike.  It took a few calls to customer support to get the phone app to connect to the wheel, but it's finally up and running.
 
I did my first test last night at WRL -- riding at my typical 18-20+ mph on the flats, using the wheel in "ECO" mode.  I used 50% of the battery by doing 22 miles -- however, the wheel's "max assist speed" was set to 20mph, so I didn't use as much battery as i might have at lower speeds.  Also, having a 20 pound rear wheel is definitely noticeable in turns, compared to what I'm used to -- and getting the trike up to 22mph or higher is a struggle without assist, probably due to the rotational inertia of the wheel motor itself.  But, overall, the assist was very smooth, and very quiet - I'm impressed... and I went up the Spillway hill at 18mph!
 
The phone app is interesting -- it shows you a post-ride graph of simultaneous rider power and wheel power tied to speed - so I could see where the wheel assist power dropped off to zero as I approached 20mph (I could also FEEL it)...
 
I've since adjusted the max assist speed to "above 20mph" (theoretically 25mph), and will take it out again tonight.  I will post some plots of the power assist tracking from the app.
 
If anyone is interested in a 700c Copenhagen wheel at a good price ($1,500 retail), let me know - I doubt I'll keep it...
 
Paul

I've been playing with a single speed one for about a week as well.  On a pretty Hilly 12 mile commute I've used anywhere from 25-40% battery on ECO mode and above 20mpg assist (which I prefer, much smoother).   It appears the ECO mode roughly doubles rider input.  So 150 watts from me is about gets added to about 300 from the wheel.  On a non-recument wind has a pretty big impact but the biggest impact seems to be how many times I have to start and stop.  The thing is very impressive from the almost bionic response feel. Commute times dropped from about an hour to 45 minutes.
 

Good to see you, Nelson / Kwijybow!!!
 
Second ride with the Copenhagen -- I figured out how to increase the max assist speed to 25mph, and it definitely makes a difference.  Went on the GDB Downtown ride from Forest Lane, through the M streets and Swiss Avenue, looping Elm and Commerce, and back up Cedar Springs, etc. for 29 miles.  Kept the assist on ECO. Most of our riding was in the 14-17 mph range, with a lot of stops at intersections.  Observations:
 
* at the 17 mile stop at AA Center, I had used 40% of the battery, indicating ~40 mile range (YMMV);
* Assist did continue up to 25mph, as hoped;
* Assist makes startup from a stop REAL easy, as well as accelerating to speed up;
* The heavy back wheel results in significant jolting when you hit potholes and such, at 15+ mph;
* The heavy back wheel also makes you have to watch your turns, on a trike -- the rear wanted to swing out a couple times in turns, which would be a lot worse in wet conditions;
* The assist is VERY smooth, and very quiet, regardless of power;
* Assist watts generally mirror my own power input or somewhat higher;
* Power tracking plots show a max assist of ~450W during a strong hill climb
* Hill climbing is AWESOME with this thing....
 
I did a few sprints and strong hill climbs on the return trip, and finished the ride with 10% battery left after 29 miles -- but if I hadn't pushed it so hard, I probably could have gone ~40 miles.
 
Next up, "Medium" assist level, when the weather cooperates, or possibly doing Flagpole Hill and Loving at WRL in ECO mode.
 
I'm also working on stitching together the speed/power plots from the app, into one continuous graph photo.
 
 
Paul

Hi Guys!  Yes the wheel seems to be power limited to 500W,  I've seen up to 498w on the post ride readout even when I was putting out close to 300.  It appears that ECO is @ 2x rider effort, Standard 3x, and Turbo is 5x.  However since as avid riders I'm sure we all regularly put out pretty decent wattage, it makes the Standard, and Turbo modes less useful, since it will quickly cap at the 500W limit with light inputs from the rider.  From a controled riding perspective I actually prefer the ECO mode without the 20mpg assist cut off,  which when activated sees your total power output suddenly cut by 2/3rds which makes it feel like the wheel is working against you.  Without the cap the power application is very smooth.  Yeah I like my fixie, single speed.  Kinda weird when the wheel is worth @8x the rest of the bike!  I could definitely see that on a Trike that extra 20lbs hanging off the back could induce some handling issues.  Its not as bad on the upright since it is closer to the center of mass, but even then it does impact the handling some.  I really like the regen activation feature by backpedaling.  Its actually easy to modulate and only requires a very small reversal of the pedals, and reminds me of the coaster brake on my childhood bikes.
 
Take Care,
Nelson.

 
 
Here are app plots from my first ride at WRL, with top assist limited to 20mph, in ECO mode...  As Nelson suggested, typical assist is to match the rider output (although not necessarily 2X), which can increase when needed -- there's a "tilt sensor" incorporated, that may be to help sense hills and offer more assist.  Response time is supposedly 30ms...
 
You can see that a lot of the assist is about a 1X match, and the last part is when I was riding at 20mph or so, and could feel the assist cutting out.
 
Interestingly enough, after I set the max assist speed to 25, the level of power assist appears to have increased to ~1.5X input power watts.  In this particular graph I climbed a hill at a fast pace at >100 rpm, as indicated by the spike in the center.
 

Wow...  in "Standard" assist level, it is NOTHING to get the trike up to 20-22mph and hold it there....  the power multiplication is 3x-5x, again topping out at 500W.  Power from a stop is ~400W, getting you up to speed quickly. Very impressive...
 
Went for a 10 mile ride, and used 40%, so basically a ~25 mile range on this setting depending upon your hill climbing.  
 
Here are plots, showing the multiplication (the speed and power indications are where the vertical lines are)   plus a shot showing the power dropoff as I approach 25mph
 

Wow Paul that is supper efficient usage of the available battery.   I need to do some longer riding to see what I get on my upright single speed.  I have a feeling the aero qualities of the trike are making a major contribution there and I won't get anywhere near that distance.
 
Nelson.

It's obviously dependent upon the terrain, which makes sense...