It’s identical in height to a 27" 16:9 1440P display, but with an extra ~8" of width tacked on to the sides. So if you were a former user of a 27" Thunderbolt display, it’s an easy upgrade.
If you are PC only, then 30" 4K displays have their advantages, especially if pixel count is more important. I had a Dell 16:10 30" for a short period of time and found the extra vertical height to be too much for how close I was sitting. The 27" Dell was a nicer blend of PPI to screen real estate and the 34" just added some more room for additional windows and tool bars off to the side so I could go from being a dual monitor user to single monitor user without too much of a hurdle and eliminating the bezel in the middle of my screen.