I still not used all off previously ordered bearings, but the one I used are much better than the one which I received with my RC helicopter. The fact is, that the original one are not ceramics and doesn't have high tolerance as those I ordered from you, so the increase of the performance is something what I was expecting. One thing I was surprised is how good is working Clean touch. I'm using it extensively now and I'm very satisfied with the result. As my experience with Bocca bearings is still very limited, I have to say that it meets my expectations so far, so that is the reason why I would like to order some more.