Correct me if I'm wrong, but haven't the graphics cards issues only been primarily affecting the Early '11 MBPs? I have a higher-spec 15" of the model in question, and every time I heard about the GPU issue, it had to do with the early year models.
Besides that and specific to the question, The Late '11s are still really good workhorses. I have the i7 version and have upgraded it to both 16GB RAM and an SSD + HDD optibay combo, and it's quite the fast + responsive machine.
In terms of OS support, you're probably looking at roughly 10.12 as being the last supported version on this machine. My previous mac laptop was purchased three years before this one, and 10.9 is likely it's last supported version, so I'd give this one about three years more of OS support.
I have three minor-ish complaints about the machine, all-and-all:
- I have a matte screen, and light bleed from the backlight has been getting worse over the past year. I don't know if this would affect a glossy screen, but it is probably the biggest annoyance for me since purchasing this. (especially because it's getting progressively worse)
- The hinge on mine is a little bit concerning in a couple ways - it seems like it wants to push the screen assembly to the right, and it's done some minor warping to the black cover between the two sides of the clamshell.
- I have 2-3 screws whose housing is a bit loose, and really have been since I got it. Not that it's really that big of a deal, but it means I'm screwing in screws every month or so.
Beyond that, though, it's a good enough machine that I'm considering delaying my usual 3-year upgrade cycle, just because I don't have a technical need to upgrade yet.