Hard to find these buttons. they're expensive but gaming mice are much more. Everything is OK. Product as described.
They're clicky enough, I have to try and fix my razer Tartarus (it's unbelievable that razer doesn't have this piece to fix it and I can only find it here!) Came to Italy in 3 weeks, really quick! I'm happy for now (I need some time to actually try to fix the Tartarus and then try the piece)