Just went to 'Ohana for breakfast and it was so much fun! DD9 and DD12 loved it, as did DH. Breakfast was delicious: tropical juice (DD12 drank a pitcher of it on her own), coffee, pineapple bread and another sweet bread that we completely devoured, a fruit plate with honeydew, canteloupe, strawberries and pineapple, Mickey waffles, and a skillet with scrambled eggs, sausage, bacon, potatoes and biscuits. The food was pretty straightforward and very good.
The characters were...awesome! They all came around and spent a good amount of time with us, even though it was a very busy Sunday (2/22/09). Lilo was sweet, Stitch was playful (he sniffed DD9 on the left of her head and the right of her head and then pretended to lick her), Goofy rested his head on DD9's head and Mickey was...well, Mickey! Very friendly! All signed the autograph books.
My only recommendation would be to get there early and check in right away. We had 10 a.m. ressies and weren't seated until about 10:40 a.m. The policy is that everyone with reservations is seated and the characters stay for everyone. Nonetheless, I did witness someone having a meltdown because of the length of wait time. I think an earlier reservation on a non-Sunday might work better, if you're available.