A must do while in LA, do not bother ugrading to the first in line tickets as the rules have changed. No long wait lines like disneyland so it is a good day out with older kids.
Very easy purchase and redemption at the counter. Same price as purchasing direct with Universal. It is more convenient to purchase your ticket via Viator to avoid ques especially when the price is the same. I think the rides were more suitable for older kids. My kids were 6 and 4 and didn't enjoy it. Would recommend for 10 years and older.
We went there on Jan 4th and it had less people during our visiting. Less waiting time and more fun. My kids love the rides and they returned to USH the next day to catch up all missed rides the previous day. Good experience.