Yeah \o/ We first build an original Mendel at my Paris (France) hackerspace, then used it to print my own Prusa i1, which I upgraded to an i2 over time using itself, and printed a Prusa i2 for a friend with my i1. RepRap rocks :)

More than a tool, 3D printing is really a big hobby for me. It's not just about getting 3D objects printed, it's also about how the prints go, how the quality varies given the slicing/printing parameters, and how to push everything further with the community.