I bought the large version of this (13 inch) for my Madewell Transport Tote. I absolutely love it. It fits all my stuff (wallet, Lily Pulizter Calendar, glasses, pens, makeup case, iPad, and my MacBook Air (in its sleeve on its side.) I don't think it's a full 13" long, as there is room to slip my water bottle where it ends and the tote wall. But that's ok! Because that space makes a nice spot to nestle a water bottle without it tipping over.

Without the organizer, things are just a jumble in this tote. Now I can find what I want. The side zip pockets are perfect for storing loose papers until I can get home.

First off, I have to give kudos to Gearonic for their customer service. I initially bought a smaller bag that did not survive beyond one week - A magnetic snap button fell apart for no apparent reason. To be fair, any product can suffer from a defective part. When I contacted them they immediately offered to replace the item - going so far as to offer to send a replacement without waiting for them receiving my defective bag.

As it was, the other bag just felt a little too small. I asked to upgrade to this larger bag and they offered a quick refund. So, I sent the small bag back and bought this bag instead.

I've had the bag for about a month now and can give a fair assessment. Like I said before, I am happy with the bag overall. But, everything can be a little better, so...

The upsides:
1. A good looking bag that can hold my Macbook Pro 15 inch model. A bit snug, but can manage.
2. Shoulder strap is of reasonable length and has proved to be comfortable.
3. Has real, heavy duty snap buttons on the front pockets.

Some downsides:
1. It's true. the zippers are not of the highest grade. I've been careful with them, but I am not sure how long they will last. They tend to be catchy and do not glide open and closed. I could see how if you rushed, it could cause the zipper to catch or pop apart.
2. The side pockets are not useful. You have to unbuckle them to gain access, and they're too small for real water bottles.
3. The magnetic snaps on the front straps are weak. They're always coming loose on their own.
4. No easily accessible pockets on the back side of the bag. The previously purchased smaller bag had one, and it was very handy.

Suggestions:
1. They should get rid of the side pockets or redesign them altogether. They won't comfortably hold water bottles or most modern phones. In the current design, I consider them strictly for looks.
2. Ditch the magnetic snap buttons. A design that uses plastic quick release system would work a lot better and faster.
3. Add a pocket on the back of the bag that is accessible from the outisde.