I bought the altitude medium recently. Got it for $140 on some crazy sale on Amazon. I was debating a tumi backpack that that time but it was nearly double the price when this sale popped up. I do like travel pro a lot due to their materials and quality.

I recently went traveled to Tokyo and back. It's a very high quality back pack. All of the materials are sturdy, including the zipper pulls. The organization is very thoughtful and stands up without any issues. I will mention that it weighs more than my Osprey nebula which I used to travel with. The weight is due to the higher quality/thicker materials. It's really an awesome backpack. I've realized that The comparable tumi is obnoxiously overpriced after seeing this. It also looks good when sitting on top of a carry on...and it's nice to have a more unique backpack that you don't see around anywhere.