We've done both and my vote went to LTT. Here's why:
The character interaction with our kids was better at LTT.
We liked the setting better (less noise, less chaos).
We LOVE having the food brought to us instead of having to go back and forth to the buffet. This way my dh and I actually get to sit together and eat as a family instead of one of us always up getting more food for either ourselves or the kids.
The only thing that I would choose CM over LTT for was the variety instead of the set menu. I like being able to sample 10 different desserts if I want to!