Got one of these recently. Given how wide this monitor is, I think the curve helps a lot with being able to see the sides better. Also the curve radius is more aggressive than on the X34 and PG348Q.
Very happy with the 75 Hz. I notice a big difference from 60 to 75. Had a 100 Hz X34 before and couldn't go back to 60, even after trying to adjust to it for a week, but 75 feels fine.
Loving the extra vertical res. That was my only gripe with the X34 and other 34" ultrawides, probably because I had a Dell 30" before.
I also sold my Titan X Pascal and bought a Fury

Massive downgrade in GPU but I'm not really running anything the Fury can't handle at the moment and already played most of the demanding games this year. It'll tide me over till Vega.
That said I would have kept the Titan if Nvidia supported FreeSync, tbh don't think I'll ever buy another one of their GPUs as long as they only support g-sync. Too many interesting options in the FreeSync market coming out to lock yourself into one vendor I feel. I don't see much on the g-sync front being released or even announced lately, unless they are saving it all for CES.