IOHO.....never again. We have been to Universal a few times when visiting WDW while our kids were growing up. The first time was great, as with anything new and fun. After that, I was not a happy camper. Place has become jam packed, wall to wall people (we were there once in Feb, once in June and once in March or April, don't exactly remember). Last time we were there was about 4 years ago. City Walk on a Friday night was like Times Square on NYE, only much much smaller space for all those people. We were literally shoulder to shoulder just trying to walk through it, forget trying to sit down and eat. This was a February trip. It was unbelievably expensive for a one day/two park visit - if memory serves about $1000 for 5 of us. Kids only rode 5 rides, once each because of the ridiculously long lines. The walk through attractions, like Twister and the Lucy place (forget the name) were so crowded we couldn't linger if we wanted to. We originally had no intention of going, but we got to FLA a day early due to DH being able to take an extra day off from work when he didn't originally think he could, so we drove down early. We were able to get WDW resort for that one night (on a cash ressie instead of points - All Stars as I recall) and gave the kids their choice of what they wanted to do with that unexpected extra day. They chose Universal since we weren't there for a couple of years, so we went. As I remember it, each store/eatery along City Walk had their own music BLASTING out in front on the "sidewalk", so it was like an instant headache listening to it all from one to the next to the next on top of the wall to wall people. The parks themselves are so much smaller than a Disney park (or so it seems to us), so they had a very confining feeling with all the people. Waited an hour for hamburgers and hotdogs - and crammed onto a dirty table to eat - gross. Best part of the three visits there were the one time each we got to ride Spiderman and the Hulk. For us it's a big "been there, done that, not going back" kind of thing. My kids are in college now, and if they ever want to go back to Universal, they sure can - but on their own dime. It isn't a place my husband and I ever plan to return to.
This is really just our opinion, and not having been there in 4 years, I can't speak to recent crowds, ride lines, cleanliness, noise level, etc. If you do decide to go, I hope you have a much nicer experience.
Have fun planning and enjoy your trip.