I have yet to actually play Dark Souls 1 for any length of time, owing to GFWL. I bought it during a sale, figuring i may as well play it. Well i download it, install it, so far so good. Turns out though that the game refuses to start. It starts up and then immediately gives me an "Dark Souls has encountered an error and must be closed", citing xlive.dll as the culprit, which is in the directory its supposed to be in (given i google'd for solutions). The only option is to remove a certain file, which while letting me start the game kills GFWL entirely, not allowing me to even safe the game.
In short the problem is that GFWL for some reason cant start properly and therefore terminates the game as well, attempts to install it manually from the MS Website always end with "sorry, we cant finish the installation because there was an error but we arent going to tell you what the error is". In short, i cant play it until such a time that GFWL is entirely removed from the goddamn game. Conversly i have gone through Dark Souls 2 thrice by now and never had any issues. So yeah, good riddance to GFWL once it dies.