I ordered two of these, one in each color.
The Pros: small enough to not be a burden to carry but large enough to hold sneakers, a change of clothes, towel, bottle, and various smaller toiletries.
The Cons: Possible inconsistency in manufacturing. The blue bag appears to be fine however the pink arrived with a faulty zipper. It only stays close if you zip right going left. If you use the second zipper going in the opposite direction the bags comes open again instantly.