Princess is quite often more costly than RCL. However, if the ports are what you are looking at then you need to think about it. Not so many kids on Princess but again - it depends on what you want and what how much pain your wallet will be in.
We're taking a Princess at the end of November. It's going to 3 ports we haven't been to and there won't be so many kids. I haven't really compared pricing to RCL as Princess is offering what I want.
More than 300 days at sea so far with many more to come. (Actually more - one of these days I'll count them properly.)
Celebrity Solstice - Feb. 21/15 (moved out a year due to illness)
42 cruises - too many to list however cruiselines are in no particular order:
and some unknown tub
Yes, I'm a Royal Chump and proud of it.