REI Mars pack?

Anyone own a REI Mars back pack??

Any reveiws??

How much weight can it handle with comfort?

Thanks alot

It's a decent large volume pack for not-so-heavy loads. With the one I used to own, I wouldn't want to go much over maybe 45 pounds. The stays and lightweight frame sheet are NOT the equal of a comparable Gregory or Osprey pack, but it is excellent for mid weight loads of bulky winter gear or the like.