I had the Vista Cruise for one season, cannot get it to work right. I filed down the cam portion of the thumb switch toggle to get a better range between open and locked. That worked. When it is locked, it is locked. When it is open, it is open. Problem ... Once the bike is moving, it slowly slips. It does not unlock, just slips. When the bike is stationary, it I cannot twist the throttle at all. I thought it may be because I was going up hill, but even going down hill, my speed slowy drops. Check the grip on the throttle again, tight as it can be. So, my only conclusion is the slippage between the steel band and the plastic ring that it grabs. Ii cannot get it to be any tighter, even though it is already tight. The ends of the steel band that extends out will spring bend on me so at some point, any tighter will only bend the ends toward each other without getting any tighter around the ring.