As described in previous threads, I am a self described pack a holic...I have the Mystery Ranch Longbow, which is basically the Pintler. I actually really like the zipper design on the Pintler, it was pretty innovative at the time. Mystery Ranch packs as a whole are generally heavier than their competition, but do carry loads well. Their description say's an overnight trip, but I could easily do 2-3 day trips with it if I packed smart. My buddy has the Sawtooth. Similar capacities, different zipper system, and not as many attachment points on the outside. If I had to choose, I would go Pintler if dead set on Mystery Ranch.
Mystery Ranch was and is an innovative company that has done a lot for the industry. I live in the same area as their headquarters, and have watched them grow and evolve. Unfortunately, they lost my business when they shipped their manufacturing overseas. Not trying to derail the thread, but that was the deal breaker for me. I do still have my MR pack though(Made in the USA version), it has been on quite a few trips.
FWIW, I made the switch to EXO packs a couple years ago and have never looked back. They are incredibly light, can carry massive loads, and are simple, functional, and durable. They are also a "one frame, many bag" concept, which is really handy.