Re: The Lounge II
I've never used GCA before (because, you know. Money.), but I find that I can get GCS to do pretty much anything I want it to do within reason. If you're running a powers-heavy game it might get a little cumbersome, though—when I was designing my home-built magic-as-power system, it required a lot of finagling and manual cost entry, but I was also asking it to do rather more than it was intended to do. I suspect that with "normal" powers, it could handle those relatively seamlessly, and it's easy to customize most things.
My only real complaint, if you could call it that, is that the default library for GCS (or at least my version), in terms of advantages and disadvantages, but mostly in terms of equipment, is not exhaustive. If it's in Basic, you're fine, and it has pretty good coverage of Martial Arts and Power-Ups 2: Perks, but nothing for High-Tech or Low-Tech (so many guns that require manual entry...).
Additionally, GCS (or, again, my version of it) cannot accommodate the LT hit location system, which forced me to make a lot of notes in the equipment section of sheets to detail exactly which armor pieces were doing what, and how. I don't know if this is a feature that GCA offers, though.