This is the only thing I don't like about the Provari. There's not much feedback on the button. Sometimes it feels like it's pressed down but it doesn't fire. I'd like it to have some feedback when activated. I actually like the button on the Vamo more. Maybe this is a little nit pickey but it annoys me on a daily basis. A lot of times it causes me to pass up the function I'm trying to get to or I accidentally skip the voltage I was aiming at. I was hoping they would have changed this on the V2.