Anybody here familiar with Tom Bihn Super Ego and Ego Bags?

I'm in the market for a well made bag that is versatile and comfortable. I've been looking around and it seems that Tom Bihn bags might fit this description. I especially like the fact that the Super Ego bag has room for two waterbottles and that you can not only fit a 15 or 17" laptop and other stuff easily into the bag...BUT I am worried that it might be too big. So if anybody owns one please let me know your thoughts.

http://www.tombihn.com/page/001/CTGY/200