I've got Kury's version of that throttle lock, which is pretty much identical. It kinda sucks, but it gets the job done. It slips when it should stick, or sticks when it should slip. I've had it bind up at bad times a few times. I've had my kids fool with it and started my bike at full throttle. 
When used as directed, it's nice to have and it was cheap. I'd buy the Brakeaway if I wanted to spend that kind of money, but I'm pretty broke.
When used as directed, it's nice to have and it was cheap. I'd buy the Brakeaway if I wanted to spend that kind of money, but I'm pretty broke.