Rating: 3 / 5
I used these shoes exclusively during my Great Western Loop hike. I would agree -- and, in fact, the GoLite Footwear people would agree -- that the durability was way less than ideal during first production run. The traced it to their factory coating the entire toepiece in the adhesive that was used to attach the fabric with the foam, instead of just the points that were going to come in contact with each other. As a result, the fabric became very brittle and tore early. GoLite Footwear will replace your shoes if you're not happy -- call them.
The good news is that this problem has been fixed and future models do not have this issue. I've been running in a Spring 08 model, the Versa Force, and it appears to be fine.
In order to increase the longevity of the '07 models I coated the toebox in SeamGrip and this would give me 400-500 miles out of them. Sometimes I'd have to occasionally repair them towads the latter end of their life with some additional SeamGrip and/or SuperGlu.
As far as performance, these shoes are really great, truly revolutionary. For a backpacker, it means less pointy stuff to give you foot bruises, better traction on snow, and better traction on dirt and rocks (because equal distribution of pressure underfoot leads to less slippage or rolling trail debris). Wonderfully sized toebox.