i've got a ryobi reciprocating saw and haven't had any issues with it. i've used it on wood and thick gauge metal, car frames, etc. no issues at all. as far as cheap, yea it is, but for the homeowner there's no need to spend an arm and a leg on this stuff. i bought a cheap skil brand skil saw from lowes and it's done wonders for me.
you just have to be smart when spending money on tools. now, i'm in the market for a table saw. this i won't go cheap on a ryobi $100 model. i know i'll have to spring over $250 for anything that's remotely decent, or that's good enough for the projects i have in mind.