Olivia's is decent...we have found it to be kind of hit or miss, although our last couple of trips they have been "hitting", so maybe that's changed.
I have found no problem with the bus transportation, although there are some who feel it's slow.
They have a boat that you can take to DD which lets you off near the Captain Jack's/Rainforest Cafe end of DD. There is also a path that you can walk to DD, which I htink winds you up near Cirque De Soleil, and walks you right past the new Saratoga Springs resort. Other than that, everything else is bus, or car if you have one.
The main pool area is nice, with a play area for the kids, but there is no special slide or anything there...just a very nice pool, sort of a little curvy, with a cute little bridge that goes over it. They also have 3 quiet pools. DH and I generally prefer to be near the quiet pools, either Turtle Pond or South Point. The Millers Road quiet pool is kind of near the road, so oyu do hear some road noise.
There is bike and boat rental, and arcade, a small bar, a snack bar near the Turtle Pond quiet pool that is open at certain times of the year, a gift shop with a good selection of stuff, plus a petty good selection of grocery items(albeit expensive).
It's a very laid-back, relaxing reosrt. Not a lot of hustle-bustle, like oyu might find at BWV or BCV.