It's a very popular bag that many quilt shops stock the pattern for. There is a full size one and a mini version. I found that the mini is too big for me, but I travel very light. :) I would imagine the instructions would be the same for both, just different sizes.
Read the directions thoroughly before you start. I believe someone posted a tutorial on it as well. If you get stuck, ask for help. There are many of us that have made these bags and we're only an email away!