The pattern is very easy to follow and I think this bag could be made by beginners. I did make some changes to the handle because I like my handles very sturdy so I inserted 2 pieces of heavyweight Pellon interfacing (the sew in kind) into each handle at the last step where you sew the top band onto the body of the bag. The pieces were approximately 7 inches x 1 inch. It did make for some thicker sewing but Pellon is so easy to sew through and I like how sturdy the handles are now.
Another change I made was to insert the magnetic snap to the lining pieces before attaching the lining to the outer shell. It just made more sense to me and I always make bags this way.
This bag is a good size at about 11.5 inches wide x 8 inches high to the bottom of the handle and about 3 inches deep when it is unfolded. It comes with a small pocket inside that is the perfect size for a phone.