Not at all skeptical, just looking for an accessible intro to GoRuck.
The main thing that might make you not want them is that they're very unstructured. They're a big empty box on your back with only minimal pockets, and if you want to impose any separation on gear you put in there you're going to have to do it yourself via other bags (e.g. packing cubes). This is in contrast to brands like Tom Bihn who have a bunch of specialized compartments to help you split stuff up. This is, of course, very much a matter of taste.
Anyways, Goruck bags were a welcome addition at the time because they were relatively discreet, easily accessible with their fold-open design, extremely well built (arguably overbuilt), and comfortable to carry heavy loads.
Considering that they offer bags up to 40L, I guess go.
My GR1 23L bag has served me well thus far. Although I gotta say they are rather pricey.