I agree with Locksmith, doesn't look great and the fact that they don't give the specific parts for the gears, crankset etc, suggests it'll be pretty poor. The advantage of buying a brand is that even the base model will at least have a decent frame.
A good pointer on quality is the groupset used, although some manufacturers are bit sneaky in this respect, by mixing groupsets so much that only a cycling geek would know what they are getting. It often works just to look at what kind of rear derailleur the bike has got. Most will have Shimano, these are from cheap to more expensive, for recreational mountainbikes and hybrids:
Tourney, Altus, Acera, Alivio, Deore (and it variants), etc....
They all work fine but Shimano also make other poorer budget stuff. I usually buy a minimum of Acera but I do a fair bit of cycling. The cheaper you buy the faster it will wear out, but I tend to wreck wheels before the gears and new chains and cassettes are cheap. SRAM also make some great groupsets, but they might not feature on less expensive bikes.
