Basically what you are getting for that price is a bike with zero customer service. You can't test ride it, no one will make sure things are adjusted properly, you can't swap components that are not the right size like cogs and chainrings, etc. If you know how to work on a bike (or have friends who do or a local coop) and know what size you need, this can be a great deal. If you are really out in the wilderness, it's likely worth the extra money to get your bike at a bike shop. All that being said, I had one (the kilo tt) and was very happy with it.