We were originally booked for 7 day land and sea (which I was thrilled about anyway!) Then DH says "let's just do the 7 day Western, it might be more relaxing, want to?" Uhhh let me think, YES!!! I am so excited! This will be our 2nd cruise but our first with Disney. DS 5 and DD 3 can't wait to get on the big boat, as this will be their first. Here's the only snafu... on the land and sea we had a Cat 4 and the only thing open on the 7 day West was a Cat 5 GTY. It says some sleep 3 some sleep 4. Whats the big difference between a 5 and a 4?