Shel-VS was the very first ship we cruised on 9 years ago, and we have been on her 4 or 5 times since then. She truly is old and worn and the rooms are tiny, but we always have such a good time! The ship's crew is happy and you are treated like royalty. It is inexpensive and a wonderful getaway!
True, she does not compare to the newer ships. We have not been on Carnival Holiday. I'm sure the cabins are larger, but it does not go to 3 ports as VS does. Holiday only goes to Catalina and Ensenada on the 4-day cruise.
VS is the better value in my opinion.
Whatever you decide, you can't hardly go wrong with a cruise!!!
PS- We will be sailing on her for the last time this July with our daughter and her family! I can't wait!