It is an amazing success. It leaks even less atmosphere -- all atmosphere containing spacecraft do -- than predicted. It has held up well to its multiple daily hot and cold cycles, and radiation exposure. And continues to send back real-time video of both the outside and inside of the station.
A sister station, Genesis II, launched a year later also flawlessly successful to this day.
In fact both have been so successful that a third Genesis test bed station was canceled, and a full sized manned station is getting ready to launch in 2014, the Sundancer.