I'm glad you like it. I think one of the reasons it's so comfortable is that it wears like a vest, not a pack. Most of the time I forget that I have the darn thing on.
I ordered the "big one" last week for my adventure/long/iffy weather runs using my REI 20% off coupon. It's on backorder, which is a real drag considering I have a bunch of really long runs coming up. I'm looking forward to using it! While I lovelovelove my Intensity, it's not quite big enough for a SPOT, a camera, a steri-pen, extra socks, food, etc., etc.