Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works great til it falls apart.

I had one for over 2 years then the gear that fits into the base stripped and fell apart. Bought a second one 4 months ago and the gear is already ruined. Gear can't be replaced, so replacement is only option. Very powerful, perhaps that's what destroys the gear. The gear isn't made to withstand the speed & power - rather stupid.