I played a round with it last night and I am really happy with the purchase. One of the things that really interested me this bag was the putter pocket area and it didn't disappoint. I can keep all my drivers and mids in the main compartment to throw from the tee pad then I have my upshot discs and putters up top for quick and easy access and a lot less bending over. The scorecard sits nicely up behind the discs as well for league/group play.
The bag is extremely comfortable. It feels a lot lighter on my back then the Grip does. I carry a big water bottle that I could really feel when putting it in the Grip and it is almost unnoticeable in comparison on the Octothorpe.
Did you have it sitting on your stool when you were throwing? My Grip AX15 (and A14 before that) is extremely stable on the ground, but I sit them on my stool so they don't get too dirty and I don't have to bend over that far. I find that more often than I'd like, my Grip will fall off the stool.
The more I look at this bag the more like it. Now weighing the option between this and a Ridge Roller for my next purchase.