I upgraded from a 15 inch 120 Hz IPS laptop display to this and the experience has been amazing
Display: This was like a double upgrade for me in terms of a)size and b)OLED
The size is perfect for keeping on your table especially if you are in a dorm like setup with space constraints
The color reproduction is amazing and there is plenty of customisation options but the place where OLED really shines is in dark scenes where the colors pop out
Though there are monitors with better brightness levels, this one is more than bright enough for me
I don't play FPS as such and have not gone anywhere near 240hz but it has been smooth so far, this display also support VRR to avoid screen tearing
Tips
Connect via Display port and upgrade to latest firmware, colors looked better for me after that
If you are using a console, change to console mode under HDMI, this will let you accept the signal in 4k and downscale to WQHD