Bought the first from makerbot, was a huge pain and disappointment, but it got me as far as printing the parts for the second one, a Reprap Mendel. That one in turn printed me (and a number of other people) the more streamlined Prusa Mendel. I'm a contributor to the Prusa variant (I wrote the build documentation and the makefiles, and contributed to some of the parts), but did not design it. So yes, as others said below, I have two repraps (and one non-reprap), and I did build them myself.
Strongly advise against the Makerbot products. They cause the highest amount of headaches and are riding on mindshare and marketing rather than quality. Have a look at http://repraplogphase.blogspot.com/2011/01/death-of-sub-1000... for how it came to be this way.