Stayed there in July and loved it. They have a shuttle to Universal at 9am and 10am, and 5:15 and 7:30 returning. $10 cab ride to Seaworld, I think it was.
Probably a 15-20 minute walk to the entrance to Citywalk, but I didn't ever walk it, since it was July in Florida. Easily walkable if the weather isn't too bad. Even if the weather is bad, I saw plenty of people walking. It's actually across the street from the parking lot, which you can see from the hotel. There are a couple restaurants and a small market on the block, which was very convenient.
Staff was really wonderful, rooms are big, pool isn't great -- there's almost no shade at the pool.
One word to the wise, though. If you take a cab from Universal back to the hotel, specify the Hyatt Place on Caravanm Court, even though it's called Hyatt Universal. I told the cabbie "Hyatt Place Universal" and he took me to the Hyatt Place on Universal Blvd, in downtown Orlando.
Really great hotel though, especially for the price -- I only paid $100 a night. Well worth it.