This is a fantastic monitor. I increased my resolution from 2560x1440 to 3440x1440, but decreased my refresh rate from 165Hz to 120Hz and don't notice or miss the difference between 165Hz and 120Hz.
I have been running this monitor at 120Hz since day one and have had it for months.
It has far less backlight bleed than any 2560x1440 monitor I have owned. It's a great G-sync panel.