We recently returned from the New Years cruise on the Mariner of the Seas, traveling with 10 family members ages 11 - 86. We had a great time. It seems that a lot people are looking for comparisons between the Mariner and Carnival Magic. Having sailed on both in the last year, here is my opinion.
We stayed at Moody Gardens the night before. For $20, they provide covered parking and very prompt shuttle service to and from the pier.
5 trips on Royal Caribbean gives me Platinum status so off we went to a very short line to get on the ship. Probably took us about 20 minutes until we were on the boat. Carnival takes at least 10 trips to get special line status.