Coming up on a year now on the VP-free. About 2000km on it.
By all reasonable measurements it's overkill for 80-90% of the riding I use it for, but compared to guys I ride with, I have I've always climbed faster and decended slower, so the bike was a (somewhat succussful) attempt to balance things out.
There have only been a few misl. problems with the thing since I got it... although it may already need new bearings somewhere in the vicinity of the BB. I'm generally pretty happy with it.