***UPDATE****So I'm updating my review because it is absolutely necessary. The customer service in handling my issues was nothing short of wonderful.I contacted Aurorae as suggested by their comment and a new backpack was shipped to me within a few days. I've had it for over a month now and I have to say I am seriously impressed. I really must have had a defective bag. I say this because I have put this new one through way more tests than the last. I manage to shove my huge Nalgene water bottle in the still very small pocket, and it fits! With no tears after a month. I've also loaded it up with lots of heavy materials (college books, changes of clothes, lunch box) and it hasn't failed me yet. I'm very pleased.I sincerely appreciate the customer service that was provided. I would absolutely order this bag again if down the line I break it (because at this point it would totally be my fault) and would definitely check out their other products. This bag is perfect and customer service is fantastic.----------Pros: Spacious, lots of pockets, fits well on bodyCons: Very cheaply made, not durable, shifts easily around torso when biking even when strapped tightlyI love this bag so much. I got it as a new backpack for school three months ago since I've been taking cycling commuting more seriously. It has all the perfect pockets and key ring and when I do want to strap my yoga mat in, the job is done well. It fits a lot more than you would expect. I carry a huge binder, a kindle and give or take a few text books on a regular basis. Sometimes more, such as a change of clothes, a lunch box and other items. And that's just the main pocket! The back pocket I usually put a phone charger and my U-lock. The large flap pocket I put a bunch of school items like calculators. The front small pocket is for pens and pencils. The only pocket I'm not a fan of is the smaller side one for water bottles. I usually end up putting my Nalgene bottle where the yoga mat is supposed to be because I can't imagine even fitting a soda can in the other one.However! This bag is very cheaply made. Within the first few weeks I saw the stitches being visibly pulled and I was afraid they would break. Especially the main pocket zipper. I'm very cautious not to over stuff the bag and shift the weight so that the fabric isn't too stretched. The zipper on the flap pocket completely came off, the top part of the zipper just became non existent. I didn't want to accept the backpack was falling apart so I got velcro for the flap. It's not working out so great. The water bottle pocket despite not being used much, has somehow forced the zipper to separate from the backpack making a hole on the bottom.I want to love this backpack more than anything (when I first got it I was convinced it was the best thing I'd ever bought!). I'm so afraid it will fall apart before the end of the semester. Considering this is considered a fitness bag, I'd expect it to be a little more durable. One might say that I am too rough with the bag. This may be the case, but honestly the tears and issues I've had were in places I was not expecting at all. If Aurorae comes out with a more durable version that's been seriously put to the test, I'll absolutely buy another one. But for now, I'll just have to try to sew the hole and deal with the velcro replacement.