Make sure your bag has YKK zippers (if it has zippers).

I used to sell outdoor equipment. If a brand cheaps out on zippers, I wouldn't trust it.

I really like my Patagonia Black hole mini MLC. Awesome access. Fits under an airplane seat. Generous laptop padding. Excellent zippers. Water bottle pocket. Lovely warranty (Patagonia store nearby often gives new product when I try to get product repaired).