I had a breakaway on my FJR, G/F has one on her Scout. We both had the same issue, it wouldn't hold steady. If you got it to hold a steady speed, then it was hard, near impossible to get it to lock. Something that cost that much shouldn't have any issues. They're been on the market for several years, they should have the bugs out long ago. I tried to call Mfg. 3-4 times, always had to leave a message, never a return call.
My $25 one works okay for a few miles, get a little break. My Kury throttle rocker works good.