We took my DD at 5 months on DCL and to WDW. Let me tell you the cruise is a million times easier because you're so close to everything. Not that WDW is too difficult, it just takes more lugging around stuff. You're never more than 5 minutes from your room. Unless you get off at port. We didn't because it was a short 3 night and we had already been to Nassau.
The servers are amazing. At our buffett breakfast we sat near the dirty dish area and many of the servers came by to talk to her and make funny faces at her. It kept her entertained. My husband was at the buffett getting my food but the servers didn't know and they kept asking me if they could get me any food.
Also as strange as this sounds... I only trust DCL with her. I was totally comfortable leaving her at Flounder's. We used the full 10 hours and the staff there are amazing. The first night I came back to get her and she had only been there for 3 hours, but they had made a bunch of stuff with her to bring home. I won't tell you what in case they're still doing the same thing
It is $6 an hour but well worth it. One time we went to get her and they had just started feeding her a bottle so they told my husband he could come back in 20 min if he wanted and it wouldn't be any extra. You can tell they really do enjoy what they're doing and they are good at it. If you have any specific questions feel free to PM me. We are also getting ready to go for Labor Day weekend to WDW and now our DD is 1. HTH