We stayed there a few years ago with our two kids, at the time ages of 4 and 6 months, and we were very comfortable there. The rooms were nice and cheerfully decorated. For some reason I don't recall it being HUGE or a long walk to our room from the elevator, but maybe we just got lucky with being assigned a room more conveniently located.
Our room had the BEST view of California Adventure park and the fireworks! We watched the fireworks from our room every night that we were there (of course this was back in the good ole days when they had NIGHTLY fireworks).
We also ordered room service several times, and I agree with the previous poster who said that the food was great and the service was fast.
The pool deck is very nice, and if I recall correctly, I think there's also 4 hot tubs around the pool. Anyway, it's a nice area and also quite cheerful.
The only downside to the Hilton is that it's a good 15 minute walk to the parks, which isn't too bad in the morning, but in the evening when your feet feel like they've already walked 20 miles that day, well lets just say it's a LONG WAY! Especially with kids. Take a cab or the ART transportation.
Have a great time!
