I own one of these, so I've decided to throw out my opinion on it. Excuse me if I'm doing something wrong, or make myself look stupid in general.
I got one about 2-3 weeks back at $80. I can't compare this to anything else, and I have no doubt that anything even slightly more expensive and well built then this will feel 100x better, but so far I love mine and it hasn't fallen into bits yet, so there's that. It's a huge step up from what I was previously riding, which is whatever the hell this is (
http://i.imgur.com/3MO4One.jpg), so this is an upgrade and sadly, probably the nicest bike I've ever had.
This is how it sits now.
I took off the riser bars and swapped the pedals for SPD M520L's as soon as I got home, so I can't speak for the bars and pedals, but I'm sure the bars are fine. The grips felt quite nice too, which was a surprise. Pedals, probably not so much. Plasticy and cheap, plus they're got reflectors.
Who uses reflectors these days anyway? Put the Origin 8 Bullhorns on and looks like a different bike already! The chainguard came off too, as did the brakes. I did keep the chainring guard though, because it helps keep my jeans out of the chainring and I wrote "spaaaaaaaaace!" in orange sharpie on it because it makes me go faster.
I had a couple short rides with the stock saddle, and man, all the adjustment in the world couldn't have made it comfortable, so I got a Retrospec saddle which has miles less padding and is miles more comfortable. Like, the stock saddle was stupidly uncomfortable. Plus, I'm sure I shaved off a couple hundred pounds with the saddle switch too.
As you can see, no brakes because A.) Gets me ton of street cred and B.) Brake levers don't fit on the bullhorns. In fact, I (stupidly) snapped the plastic housing on the levers trying to fit one on. The levers themselves didn't feel that sturdy though, and the brakes didn't inspire confidence either. In fact, when I took off the cabling, the ends were already quite frayed, and the lines just kind of fell apart. I'm planning on getting some reverse levers sometime in the future though, since I live in a hilly area and don't like thinking about going 30 miles an hour with no brakes on my commute to my friend's house.
Now we get to the wheels. Ahhh, wheels. When I got the bike, the rims seemed to be fairly in true. I've been on a couple rides since, and they're a tiny bit out of true, but nothing noticable. However, I'm not surprised, as 300lbs will do that to a cheap wheelset. The tires are at 50 psi right now, and they're quite comfortable rolling over things like train track and pavement, and even the occasional crack in the road sometimes. Down curbs, too! I am, however, quite annoyed at how wide they are (38c), and will be attempting to get new tires soon.
The bike it's self is quite heavy though, and I'm not sure what to attribute it to. I want to say the silly wide tires, but I think it's the frame. I'm planning on replacing the crankset, since I can't change chainrings, so that should take some weight off too.
Dunno why I'm putting money into it, but it's a fun bike and it gets me around. I'm new to fixed gear bikes and more serious biking in general, so keep that in mind when you're thinking of what an idiot I am when reading my thoughts/review thing on this bike.