Sunfun:
HIFS is, I believe, about two years old. I was there in January and it was brand new and very clean. Since I was there in a very cold time I had no chance to try the pool, though.
I stayed at All Stars Music three months before staying there. There is no comparison, really. Of course All Stars is onsite so you get the plusses of being onsite but I don't like being on top of everyone else in my room. The HIFS kidsuite is small but it has separate sleeping places and, what I REALLY liked, 3 TVs! The VCR and the videogame set was a blessing also! All Stars is great if you spend most of your day at the parks, which I do in the summer, but in the winter I spend alot of time in the room, so I prefer more space.
I guess that's a personal decision.