I also have a 2nd production run CCS and now that I've gotten a chance to ride it a bit I think this would be a good place to share my thoughts as well as I definitely have a different perspective than Reid.
On the positive side, the bike as much power as I hoped and its easy to maintain 28mph when the conditions allow for it. I also find the throttle to be extremely useful as it means I don't have to downshift when I get to an intersection. I generally just keep it in 8th gear and when the light turns green I give it full throttle and am generally quicker through intersections than cars. I find the stock handlebars to provide a good riding position for me and while I think I would prefer a slightly larger and softer seat the stock one is quite good. The other thing I'm very impressed with is the wheels and tires. The Sapim spokes feel very solid and I haven't had any problems with spoke breakage despite riding at top speed on the rough roads around Dallas. The tubes also hold air very well; in most other bikes I have, the tires need weekly inflation these seem to be able to last for several weeks, but its too soon for me to say exactly how long.
Now onto some of the things I think could be improved. After setting up the bike, the first thing I noticed was that the rack was not straight, I've tried bending it a bit and I may have improved it, but the light is still not centered over the fender. The light that comes with it fits nicely on the rear of the rack but it doesn't flash, its just on solid or off. I think a flashing light is a lot more visible and uses less battery so I don't really understand this choice. While trying to find a replacement light for the back, I've found that its almost impossible to get one that works on the included rack; the rack mount brackets either hit the top of the rack or the top of the fender because the plate you mount it to is not at the back of the rack. For now, I've just opted for a 2nd light on the seatpost, but that's less than ideal since I sometimes carry bulky items on top of the rack.
On the assist settings, I fully agree with Reid that there should be an option to ride with light and no assistance, or at least less than what Eco provides. Sometimes I ride with my wife who doesn't have an electric bike so with the assistance on its sometimes hard to go as slow as a regular bike. Another thing I find mildly annoying is that from a stop the assistance is a bit slow to kick in if I don't use the throttle, I thought with the torque sensor it would be nearly instant, but it seems to take about 1/4 of a rotation before kicking in. Lastly, when playing around with some of the settings I though it might be a good idea to up the minimum voltage on the battery to stop it from discharging all the way and thus prevent damage to the pack or at least act as a warning that the back is nearly dead. Unfortunately, even with a fairly full battery this prevents the bike from getting full power as it seems to drop the voltage significantly when under power.
As for accessories, I'm still looking into some more things, but I've added:
Panniers, a
light, a
phone holder, and a
mount for my
bluetooth speaker and am pretty happy with all of them. Today I also got an adjustable
bottle cage at my LBS, but I'm finding it difficult to actually get a bottle in and out with the battery there even though it does fit. If anyone has found a bottle cage that wors well on the CCS I'd like to hear about it.
I still want to get a suspension seatpost as well, but haven't worked up the enthusiasm to drop $100+ on one yet and the cheaper ones seem likely to disappoint me.