While I haven't been to the one in Cinderella's castle (making those PS is such a hassle), we did go to the one in Norway 2 weeks ago.
We LOVED it! We were seated right away. We had a 8:50 PS and were seated at 8:40. The inside of Akersaus looks just like a medeval castle. The service was fantastic! The management came around to the tables to make sure everything was going as it should. The food was very good. When you are seated there is fresh fruit and various sweet rolls and biscuits on the table. Then the server comes with fresh orange juice ( you can get grapefruit juice, as well), and takes you drink order. About 5-10 minutes after you get your drinks, they brink a large skillet to your table with eggs, french toast, bacon, sausage, and cheddar cheese potatos. The eggs were cooked too hard for us, but everything else, especially those potatos, were delicious.
The princesses start at the front of the dining area, and they are staggered, so no 2 get hung up at the same table at the same time. We preferred sitting in the middle to the back, so DD could eat before they got to us. When we went, it was Snow White, Aurora, Belle, Mary Poppins and Jasmine. I have heard that Alice in Wonderland sometimes makes an appearence, and there can be anywhere from 4 to 6 characters, depending on which characters are available on that particular day. We were there on a Friday. The characters all are VERY good, take a lot of time with you, posing for pictures and signing autographs. It is in no way rushed feeling, as I have heard it is at Cinderella's Royal Table.
Personally, if I had to choose between this and Cinderella's, I would choose this one, for the ease of getting PS, the variety of characters, the service, the food, the feeling of not being rushed. Also, if you are going before Dec 30, make sure to go, as they still haven't made up their minds as to whether this will be permanent, so it could be a once in a lifetime event!