We've gone through a few of the Food Savers. They don't seem to last either, but I think the problem may be all about the gasket and an easy fix.
I don't really know that much about it however, the wife is the one into that sort of thing.
I put up all the veggies from our garden and I never use it.
I see the Food Savers in the local thrift store (Salvation Army) regularly