Bought to replace the dying G413. I bought into the "semi-mechanical" category (also called "hybrid"), in fact it is an ordinary membrane, it only rattles harder, especially when printing fast. At the same time, the rumble is plastic, unpleasant, and it is at the moment the key is released. The wife said that she could hear from the other end of the apartment. There is no tactile response to pressing, which is why I skipped characters more than once, thinking that I had pressed a key. I used it for about a week and returned it, bought a Bloody B800 instead and am happy as an elephant, I added only ~ 400r.