It was super-easy (it has to be if I made it!). Here's how I did it:
Step 4: Try it on right after you get out the shower while you are still wearing your towel-turban and decide that you look a little too much like Larry the Cable Guy. Okay, so it's not that bad, but I decided to take in a little more of the sleeves so that it would look more feminine. If you like the way it looks, skip ahead to step 8.
Step 7: Sew that seam.
What do you think? I'm pretty excited about since it was so cheap and so easy. In fact, I'm thinking there might be more thrift store re-purposing in my future...