You may recall that I had some not so great experiences with my VFF Trek Sports (read here). I bought a pair of Trek Sports, and split a seam in less than 30 miles, got a replacement, and split the seam again in less than 30 miles. I was pretty put out, but due to Vibram's generous return policy, I got my money back both times. I finally found a pair of Treks and couldn't be happier with them. Treks have the same sole as the Trek Sports and the same basic design, but they have a leather upper instead of the nylon mesh of the Sports.
So far, I have run a trail marathon (Cross Timbers) and a trail 50K (Toughest in Texas) in the Treks, plus a bunch of training runs on trails. I don't know the total mileage, but they have held up well through it all. I still love running in them, I just have to decide whether they will be sufficient for longer runs on rockier trails. At the TnT 50K, when I was running with Joe P., I mentioned that I had met one of his Austin runners who was running in one of Joe's races in VFFs. Joe's comment was, Yeah, but he hasn't finished those runs! As comfortable as they are, they do lack the foot protection that many trail running shoes offer. I may need to try another shoe for some of the runs on my calendar, but for shorter runs, and runs on trails that are less rocky, VFFs are the shoes for me.