Having an X-Large framed mountain bike, I had high hopes that this would cope with the size/high centre of gravity. Sadly not and twice now my reasonably expensive bike has crashed to the ground, damaging the frame of the bike. Not happy. Having said that it is robust in build as I have tried, in vain, to beat the cr@p out of it and it stayed intact.
My advice: this might be good for a child's bike or a smaller framed ladies bike but if you want something that will work for a large framed bike, then pay more for a metal product.
1 star for the robust build....