On our 1st trip to 'Ohana we reserved a 9 pm dinner knowing that Wishes would be at 10. I was very annoyed with the CMs at the podium--they messed up our ressie, kept on asking us for our name, had us waiting for 20 min even though there were lots of empty tables and then when they seated us (not near the windows, not too far from the entrance) I asked about the Wishes view and they said "You'll have a great view of the fireworks here."
At that point I was happy just to be seated and eating--the food was great too. But guess what--when Wishes started, after a couple of minutes looking at the show and wondering why the castle looked so flat and wide and why we were only getting glimpses of fireworks I realized--our "great view" was a view of Space Mountain! So if you want a Wishes view you may have to wait for a table that has a real view.