-This is the only backpack bag I've ever owned. I've had it about 3 years now. I fit 19 discs inside, of those discs, 1 is classified as a putter, 4 as midrange, and the rest drivers. There is a minor amount of wiggle room, though not enough for me to add another disc (unless I wanna swap a mid/putter for 2 drivers). I have 2 putters outside the bag in the putter pocket.
There is space for a stool on the outside (or an umbrella, or both) When the stool spot isn't being used it perfectly fits a 12oz beer bottle (at least on the older ranger models). The drink pouch will hold 2 - 700ml disposable water bottles squeezed together fairly tightly. The mini pocket is nice, but it is loose if you dont have stuff in the zipper pocket. The mini pocket will not hold macro discs, however the macros fit wonderfully in the attached zipper pocket. The side pocket above the drink holder is a good size for a smaller cellphone or keys/wallet, or even a few birdie bags/rosin. The largest pocket is a very nice size, I store all sorts of things in there, you could easily fit a 6 pack of cans, or a thick hoodie, or some extra discs, or a large size portable bluetooth speaker, or maybe some sort of medium size glass sculpture if you feel like it.
The straps are comfortable, though this bag can get pretty heavy depending on how you utilize your storage. This bag fits nicely inside of the Dynamic Discs cart, though don't plan to use the putter pocket. This bag has maintained its shape really well considering I've been dragging it around rain, snow or shine. When the bag is wet sometimes the fabric dye comes off onto my skin. Some of the stitching (the DD logo) has started to unravel, mainly due to prickers and excessive wear.
No zipper issues, no torn fabric or holes, and even without a rain cover the inside of the bag stays dry. I'd gladly re-buy this bag even never having tried another one of this tier.