I bought a Tenzing 2200 as well as an Eberstock X2 earlier this fall to try out. The X2 is WAY more flexible, comfortable, and just all around nice IMHO. You can carry huge loads if you need to, or just cinch it down into a small, comfortable pack. I sent the 2200 back.
http://www.eberlestock.com/X2%20Pack.htm
