I'm really happy with my PM. I'm petite so it fits comfortably on my shoulder, the only complaint I have so far is that the outer strap falls off my shoulder so I have yet to find a way to correct that. It hasn't gotten to the point where it bothers me a lot. It sticks out a little near the bottom but again not enough to bother me. When I had tried both the PM and MM on in stores and the MM was definitely too big on me. It was diaper bag big so for my purposes (as an everyday bag) it was too big (although it would be good as a carry-on travelling bag or school bag or baby bag. However, if you need more length in the straps, the MM size will provide that. When I recieved the PM I thought it was smaller than I had expected but it really is suffficiently big. It fits more than the Cabas Piano and opens up real wide so it can fit a lot and is easy to get things in and out of. When empty, it is pretty floppy so I am once again glad I have the PM instead of the MM because it holds it's shape a bit better. Overall, I love my Saleya PM. Hope that helps!