Our first trip our youngest was 2yrs old and we did Akershus princess meal (so totally naive we just walked up and they got us in. We didn't know a thing about this board or ADR's or anything back then- spur of the moment trip over Christmas holiday also LOL) -she loved it.
But she liked princesses even back then.
She became OBSESSED with princesses- especially Cinderella- after that though. LOL
She turned 3 during our next trip- and we went to CRT- she loved it! The rest of us weren't so thrilled with the food, etc. though. We haven't been back there.
I'd HIGHLY recommend the princess/etc. dinner at 1900 Park Faire though. We've gone to that several times and the kids really enjoy the characters (even the older ones- there's even Prince Charming for DS! hehe) and the food is better (IMO) and the atmosphere is just more relaxed/etc. I think maybe we just like not being crammed up next to other tables and prefer dinner meals rather than breakfast. The breakfast ones are nothing special really- and we just don't like to eat much in the morning so it seems like it's really not worth the money. We've never felt it wasn't worth the money at 1900 Park Faire. Our youngest also really loves seeing Fairy Godmother out in the waiting area before going in... she's had some special moments with her there.
But if she's only into Ariel anyway- she can just see her at Ariel's Grotto, right? And save all that money.