It is in the Animal Kingdom Lodge. Enter through the lobby and then down a flight of stairs.
I was there in Feb. for dinner. I thought it was very very good, but California Grill IMO is the best place on property...Jiko is different cuisine than Calif. Grill however, so it's whatever you're in to that night.
I haven't been there for lunch...I would take the kids if they're well behaved in a nice restaurant...or if you want an adult night, there is child care at AKL.