Throw away all the steel components, put a decent shock and fork on it and they're awesome. There is even a little triangle room for batteries. I picked mine up used for $80, and i already had all sorts of components lying around already.
You are basically buying a frame with the shittiest components possible thrown on to make the bike affordable. The Fork is basically welded together by chinese kids suffering of parkinsons disease. The wheels are a joke and warp almost instantly after a few good jumps. The stock spring creaks along, but is actually very firm - perfect for someone who is You can drop about 8 pounds off the bike's weight with aluminum. The bikes are often very poorly assembled as well. But if you are a DIYer, can work on a bike etc, they are a steal, because people often abandon them and put 'em up on craigslist after a month or two.
The frame construction looks tougher than 90% of dual suspension bikes i've ever seen. Considering that i will put >30lbs of battery on it, and i'm about 240lb, confidence that the bike can handle the weight is concern #1.
I would not ride anything at the weight rating! Those folding bikes are just really flexy by nature. Turns out that a triangle is the strongest shape in geometry...
And yeah, i would fork over for a better used full suspension bike. But i looked for one with decent dropouts, construction, etc for a year and finally just settled on the genesis since it met my requirements already.