I wanted to love this bag, and if was cheaper, I would accept the glaring flaws. The reason I bought this was because it was carry-on size with a breakaway backpack. In my mind, this was going to be great because I could keep my valuables and electronics in the small backpack and clothing and other random items in the large backpack.

Pros:
The main bag was a great size with a perfect liquid accessible pocket for TSA.
The backpack strap/handle area can fit your clutch, sunglasses and an iPad with an otterbox case. Again, great for getting through TSA.
It was comfortable to wear as a backpack because of the double handle and the handle felt robust.
Cons:
My main reason for buying this one was the breakaway day backpack. Well, it is tiny. They took up a ton of space for this structured mesh piece, which I think is supposed to prevent back sweat, there is the mesh piece, 2 inches, and then the actual backpack. Which means they left no space for the actual bag part of your day pack. I found the foldable backpacks could hold more. If you don't like a sweaty back and only need to hold a small tablet and some personal items, this is great. Unfortunately, I would have liked to get my camera in there and the 2 inches of air would have created the space for it.
Second, the main bag is not accessible with the backpack attached and the items in the backpack are not accessible with it attached to the main bag! This is useless for getting through TSA and I would have been better off with a separate backpack.