The Studio Display is a fantastic monitor. The issues people are having with it are subjective and break down to the following:
- For a $1500 monitor, some think the webcam should be better. Understand that Center Stage requires a wide-angle camera so the software can intelligently pan around and keep you and others in view. When it's just you, it'll zoom in, which can introduce artifacts/pixelation that wouldn't happen on a fixed field-of-view camera. So Apple had a choice -- Center Stage (and live with some artifacts) or a fixed FOV (but no Center Stage). It's a matter of opinion which way they should have gone. Good arguments on both sides of the issue. Personally I'm fine with the camera quality. I just use it for Zoom meetings for work and for occasionally FaceTiming with family. I'm not creating broadcast or 4K YouTube content with it.
- For a $1500 monitor, some think it should support higher refresh rates. Maybe, but 120Hz at 5K resolution is, so I've read, more data than can be transmitted over a single Thunderbolt 4 connection. So I think this complaint simply isn't realistic.
- For a $1500 monitor, some think it should have either been a mini-LED display. Perhaps Apple felt they couldn't do this within the price point they wanted to hit. Either way, even most high-end 4K displays don't have this either.
- For a $1500 monitor, some think it should have come with the hight-adjustable stand (not a $400 option) and/or should have included a way to mount the monitor on a VESA arm without having to buy a whole separate display. I kind of agree, but Apple will be Apple.
All that said, the monitor is an incredible 5K display with a blinding 600+ nit brightness rating and outstanding color quality. It's in a class by itself, regardless of any shortcomings.
I love mine. I have two.