IMPRESSION BASED ON EXPERIENCE:
I bought this bag because of the good reviews and the fact that I own a Teton Sports Fox 75+10L that I bought for about $50 a couple of years ago that is packed with quality and worth way more then $50. I thought this was going to be a great pack because is was made a Teton.  I bought it to take day hiking up in the Colorado mountains where I planed to go fishing in some remote lakes.  I did not need a full size back pack. I just needed a good quality little day pack to carry a lunch, water bottle, a jacket and trout fishing gear in.  When I got the bag out of the box I was impressed with the heavy duty zippers.  But then I looked at the shoulder straps and back padding.  What a disappointment!.  They were no different then my 6 year old's kindergarten school pack I bought at Wal-Mart for $7.  I received the pack the day I left for Colorado so I had no chance to buy another and I had to use it.  What a killer!  The pack has no kind of structural support what so ever, so if you put a heavy round object in it, such as a 1 quart water bottle, it deforms the back of the pack.  On the first day I hiked up a mountain from 8,200 feet to 10,600 feet to get to a lake.  I had about 10 pounds of stuff in my pack with plenty of room left over.  By the time I got to the lake, my back was killing me and the straps felt like razor blades cutting into my shoulders.  When I took the pack off the back was bent in a U shape.  I was thinking my 6 year old could use this pack when he start 1st grade in August, but if this thing cannot even handle a one quart water bottle without becoming completely deformed, what will it do with the heavy books kids have to carry these days?

PROS:
Heavy duty zippers.

CONS:
No suspension system or structural reinforcement.

BOTTOM LINE:
Unless you just like heavy duty zippers, this bag is no better then any other low quality book bag.  It might do well with lightweight soft items like clothes, but it does not do well with hard heavy items like books and water bottles.  For a company like Teton to produce a bag like this is a step down and bad for their brand name.  Why, when for just a little more you can get a high quality full size pack from Teton, would they not put a little more structure in this bag?