"I've had a few pairs and think they size like most other brands."
I have a few pairs too and, while the size designation may well be the same, shoes can differ greatly in overall fit. For example, my Montrail Fairhaven's have a wide and roomy toebox, my Montrail Mountain Masochists are narrow and tight all the way through. Both are size 9 and both fit me. They're very different, though. I kept the Mountain Masochists b/c, technically, they "fit", later came to realize I just couldn't live with their narrowness. The runningwarehouse applet I mentioned in post above clarifies these differences.