This is the "Piping Hot Hobo" pattern from the book by Lisa Lam, "The Bag Making Bible." This makes a medium sized bag, but Lisa includes instructions on how to enlarge or reduce the size. Her instructions made it easy to make a bag that looks like the sample photo in the book.
I wouldn't recommend this pattern for absolute beginners, but it you have some sewing experience and are confident with your sewing skills, you should be able to follow the instructions easily. I liked that there were some options that could be added to customize your bag. I added a zippered interior pocket and the "concealed top edge zip." I used a cotton Dia De Los Muertos print by Alexander Henry and the "Dumb Dot" in Sorbet Pink by Michael Miller for the lining.
I did some alterations to the pattern by making the gusset narrower and eliminated the side popper snaps. I will make this purse again as this first version is a birthday gift for a friend who just loves Sugar Skulls; although next time I'm going to narrow/taper in the gusset towards the top of the bag so it doesn't have gaps at the top where the handles attach. I will also check the placement of the snap on the outside bag flap more carefully. I found the placement marking on the pattern left it just a bit short and oh-so-very-slightly strains the flap when closed. This is probably caused by the fact that I eliminated the side popper snaps which collapse the upper edges of the bag.