The bag is big and roomy with two exterior pockets. I can fit diapers, my wallet, library books, and packages all inside, and still have room to grow. One thing I would change next time is the strap - to make it a tad longer, and, although the current strap is interfaced, I can't help but feel leather handles would be much more durable.
I am extremely pleased with how it turned out, although the pattern itself was very difficult. For one, the pattern, tutorial and photos are in three different places - one online, and the other two in separate PDFs. This results in a lot of running around to figure how many of what to cut for each pattern piece, what photo example coordinates with each step, etc. The resulting tutorial is very unorganized, and the directions are random and hard to follow (I ended up with an extra pattern piece at the end?). I would definitely not recommend this for the novice sewer, but there are a lot of online resources for help figuring out the pattern.
Now that I've actually made one, I might give it another shot when summer rolls around, maybe in a light linen with extra pockets added inside? It really is a great bag, despite the headache!