I have about 10 minutes of seat time with this installed. No adjustments were made aside from initial min/max throttle voltage. It's about 30ºF outside, so its not the best conditions to be going 50. I will be doing a more detailed review when I get everything dialed in, but this is just my initial reactions.
The board appears to be doing exactly what I assumed it would, aside from the substantial delay. Presumably most of the delay while it is ramping up can be tuned to my liking, but the delay when I snap off the throttle was very obvious right off the first twist. I got more comfortable with it very quickly, but it feels like the bike is going to run away for an 1/8 second. In practice, I don't think its an issue for anyone thats used to it, but it can feel significant. I'm assuming its how the board is set, but the delay in throttle response was making me twist the throttle too far and then back off.
The ramp up is very nice and smooth, and how the bike reacts when you snap the throttle WOT from a stop is great. The controller sounds happy about it. I think I can dial the ramp in response exactly where I want it with some time. Presumably when I get a controller big enough on the bike to effortlessly lift the front end, this could be beneficial. I was getting about 110-120A peaks, probably something in the 85V range, loaded, given the ambients and not terribly high SOC. It takes about 200A before I can't keep the front end down. It will probably be a while until I can test the board with a controller capable of that.
I should note, I'm used to riding WOT. Typically I flip the kill switch, snap the throttle WOT, and snap off when I want to slow down. I do a lot of full throttle cruising, and 95% of the acceleration is WOT. I suppose one could argue I don't need throttle acceleration for that kind of riding.
I think this board can be really great to go slow on >10kW bikes. Presumably some setups can be really twitchy at lower power levels, and it might do wonders for rough terrain, but I didn't test it on that yet.