I recently switched from a Hyzerbomb Flak X to a Zuca Cart, which is great. But when the cart is too much I started using the commander that I got at GBO... and let me tell you- it's amazing!
I used it at Ledgestone this year for the whole tournament and I have absolutely no complaints! The lack of top storage didn't bother me at all because the sides of the bag zip all the way up/down and create huge side pockets. I fit all of my snacks, wallet, phone, everything else in there just fine and you didn't even notice it was in there. The two drink holders are perfect size for bigger bottles and have a tight band to keep them secure.
This bag fits the same amount of discs as any other backpack I've tried, if not more. It seems to just keep fitting discs in the main pocket (it might be a bit wider than the ranger). The putter pocket fits two putters easily, plus you could put another one or two up there if you needed a couple more discs. (Or in the side pockets as well). It has a nice scorecard and pencil holder right on the inside panel as well, which is so nice for keeping score. Usually I have the card and pencil in some crazy pocket and it gets bent or lost... not with this bag.
Another nice feature is that is has little feeet that keep the bag off of the ground, so the bottom doesn't get completely dirty when you set it down in the mud/dirt. It's also very bottom heavy, so it rarely tipped over, which was a problem with my old bag when I had stuff in the top storage. It just sat wherever I put it, even on hills. I hate bags that tip over a lot so this was a huge plus.
It felt very sturdy and very comfortable. The shoulder straps are quite padded and never hurt me after a week of playing everyday in the tournament. If fit perfectly on my back, which is very nice because I've tried other bags that dig into my back in weird spots, but this Commander did not do that at all.
Another nifty feature is there is a strap on the side for inserting your stool or umbrella into one of the cup holders and strapping it up the side of the bag. This makes it so much easier when you need to walk longer distances or when it stops raining. They also make a really handy rainfly for the Commander, so that's a good accessory if this is your main bag and you're worried about rain.
In my honest opinion this is the best bag on the market for the price. I don't know why I'd pay any more for a bag this nice. It's so good! You won't regret it!