I use it often. I find it works better on some games than on others, but like all graphical and display settings I need to mess around with it a bit to find a sweet spot.
It's recently enabled some nice 4k pathtracing shenanigans for me with RE9, and the only graphical compromise made to achieve 240fps, is setting DLSS to balanced or performance. There's a tiny bit of ghosting, but it's barely noticeable, and better than the alternative 70fps base framerate.
Special shotout to lossless scaling which was mentioned above. It can be a bit rough and lagy at times, but it works on any application, even a Youtube video which is usually stuck in 60fps pugatory.







