We recently stayed two nights at All Star Sports. We'd never been to a value before. The place was cute and perfectly serviceable -- and our boys reported they liked the arcade at ASSp better than the one at GF (we moved to GF after two nights). We couldn't see much difference in room size between the values and moderates (we've stayed at CSR and POR). Frankly, even the GF room was none too large. For sheer roominess, CR can't be beat, IMO.
The one thing we noticed and really did not like at ASSp was the turbo toilet flushing noise night and day. If you can live with that, the values seems like a reasonable choice if your focus is going to be on the parks and not necessarily on the resort and its amenities. We decided to cut the price of the trip with a 2-night value stay since we knew for the first two days we'd be going day and night at the parks, including Pirate and Princess Party one of those nights. It worked out fine.
Would we stay at a value resort again after our two-night experiment? You bet!