At the price you are hoping for, nowhere for the time being. It was a bit better a couple months ago, it would appear the manufacturer makes these in batches, so the price drops suddenly with a bunch of product out, and then the price goes up or simply the vendors who sold it at a fair price run out of stock.
The best way to describe the feel is like an auto clutch on an atv, go kart, moped, scooter, or the similar. I don't like how long it took to get the pads engaged since I like my "crawling" speed with an idle. On the shift kit I thought it was nice how comming off the throttle made it significantly easier to shift on a nuvinci hub since shifting even under light power feels resistive on that hub. It was most noticeable under high speeds.
The part I did not like was first of all I had no clutch lever "feel," I could squeeze my clutch and slip into gear like I would otherwise, but it drops off when pulling out because the speed of the motor isn't enough to engage the pads. It also felt more shaky on my engine, but my crankshaft is already unbalanced so...
It's an OK addition, I don't think you should eliminate the clutch lever from your bike since you have a bit more in options with it, like starting the bike up and giving it some high revs to clear its throat, if you take the lever off you can't do that without the wheel engaging, so you have to be off the bike to do it safely. If you give it gas to keep it from passing out on an idle and you just have the auto clutch the bike takes off. Not only those things but if you get an air leak your engine will go too fast anyway and try to drive the bike on you when you don't want it to. It wasn't on my bike long enough to probably justify my opinion but it is what it is.
You may have to wait for the price to come down or just have to suck up the price it's at now.
Are you proficient at working with these motors?