My impression is that the action of this controller is pretty good, although there was a little rattling key on the fast repetitions. I had an issue with some of the keys on the high pitch side, since I felt that they were not playing as clear as they they were supposed to. I did not manage to succeed in using the software tat comes with the product, and I did not find any video on the web to help in great detail. There are several velocity curves available, and this helps, but also in this case I did not manage to make them more flexible. Again, I think that the issue with this product is the lack of support online which would be instead necessary. There is online only a video by Chris Martirano that illustrates the product, which is good, but I did not find it sufficient. The manual is clearly not sufficient.
I would say, anyhow, that this is a 4-5 star product overall, for its quality, being also very quite. It can make a traditionla pianist quite happy.
Thomann handling: 5 stars, as usual. They are fantastic