Review on Dell P2721Q Ultra Thin DisplayPort Certified 4K 3840x2160P Monitor with 🖥️ Flicker-Free Technology and Multi-Adjustment Stand, USB-C Connectivity - Dell 27 4K Monitor by Nelson Lema

All in all, a well-functioning monitor. Received this as a P2415Q upgrade (I would argue that the color and brightness uniformity isn't as accurate in the new one as it was in the old one). Big flaw: A few days after purchase, the screen shows a thin but noticeable image. Delay in certain cases (ghost images of previously displayed images with a predominance of light colors appear against a dark background). I tested the same conditions against p2415q and it doesn't happen. For now, it goes away with regular use after "looping" multiple windows on the same area (or using the built-in LCD conditioning option in the menu). Anyway, I didn't see what happened on the previous monitor. (Hence my 3 star rating). Inputs and USB ports are sufficiently available and well suited for the work environment. USB-C charges at 65W, which should be enough for almost any laptop (there's no USB-C output. If you need one, you'll need a USB-A adapter). Please note that there is no DP downstream compared to other P series. The colors are good and the preset modes are useful. The menu is easily accessible (IMHO, much better than the U2720Q). So without the halo effects it would have been 5 stars. I might have been unlucky and got a bad IPS panel, but at this price point I don't think there should be ghosting.