This bag was just delivered yesterday and I haven't had a chance to use it, but I have to say: its enormous and seems super sturdy! Happy so far. It doesnt have a zipper on top, I knew that when I ordered. I actually WANTED one with no zipper. Theres another version with one, for about $5 more, but I knew - for what I want it, I wouldnt bother with zipping. Ive been drooling over those LLBean boat bags for years but Im not willing to pay $50 for a bag to haul my kids swim and soccer supplies. I am about to take it for a true toughness test - a library run. Wish me luck.