We haven't been since they made the Harry Potter lands. I'd like to see it as it sounds cool, but neither of my kids are into Harry Potter. I was waiting for the past 5 years to see if either one would get into it, but they still haven't.
My daughter doesn't like anything at Universal.... yet. She's a huge Nintendo fan, and would love to go when Nintendo land drops. My son likes Spiderman, Minions and Dinosaurs. So that's a 1/2 day, that's it.
I'm sure Universal will become a destination for non-Harry Potter fans once Universal Epic opens, but that will be years from now.