I have an AOC U3477PQU at work that I use with a 2015 MBP. I use a mini-displayport to displayport cable to connect it.
PROS:
The screen is great.
No dead pixels either.
Seems to update fast enough that I don't see any ghosting or other artifacts.
plenty bright in my office lighting.
CONS:
I use a thunderbolt dock, but it can't handle being in the daisy chain. (MBP->dock->AOC) So I have to plug both the dock and the monitor in using the two thunderbolt ports on the MBP. I have this issue with a smaller 29" ultrawide display I use elsewhere too.
If I undock and disconnect the MBP, then plug things back in (like after a meeting), the MBP and monitor occasionally struggle to get the monitor functional. The MBP display and AOC monitor "wink" on and off while they try to figure things out. This can take a few cycles. Sometimes, the MBP gives up and I have to close the lid and open it again to get it to retry. So far, that has always worked. I don't know if this is an issue with the monitor or something that happens with monitors this large.