i read somewhere that they are made from hi-ten steel not cro-mo. this means the weak. my mate brought one because they are so cheap, the forks came bent, the seat post is to small for the seat tube and one of the stem bolts wasnt correct and didnt fit. I can almost garantee they wouldnt of waranteed this even if he asked.
Unsealed hubs , plastic seat, tesco value tyres, mongoose rims.. Id say buy it. Nah seriously though, i know many people who have bought these and by the time they have finished fixing the parts that break, they have a whole new bike! The geo on them is alright, but i just wouldnt trust anything that cheap anyhow. The frames are liable to snap, the hubs last seconds and you can buckle the wheels just by the weight of the bike resting on them.Probably worth the money, but seriously its never worth buying a complete unless if it hasnt got sealed hubs. Save yourself some £500 and you will never need to replace a part.