We enjoyed it. We did the all-day dining on one of our days, then Dine with Shamu on the 2nd day's visit. You can check out our experience in my trip report by clicking here:
Food was fresh and good (with a nice balance between grown-up selections and kid-pleasing options), service was great, and the "show" (which is more like an information session with some neat little tricks and displays thrown in) is really quite enlightening.
Thanks for the info. It is something I am going to have to think about!
FYI - We did the 'Ohana breakfast last time we were there. The food was awesome and the kids loved it too. I am hoping to go back again this time. Need to talk my husband into it again! Even though he loved the food too!