Very high quality. Very important that it does not start flashing with power interruption and return, but remains in the last state, which is a lifesaver as I have bought several controllers to find one with this specific feature. Also, it is excessively small compared to other similar products on the market. Finally, the only negative thing I found is that the infrared eye is directly attached to the board, but you can easily detach it and make an extension if you have a soldering iron and the desire to do so.