Harmony – Traditional vs. Any Time Dining?

We travel with a large group of family that likes to have dinner together each night. In the past, we've always been Carnival Cruisers and scheduled early dining in the main dining room. This is our first Royal Caribbean cruise (we'll be on the Harmony of the Seas in May 2017), and we're a little overwhelmed with the dining choices. There are 15 of us and we think we'd just like to dine in the main dining room each evening. What are the pros and cons of traditional dining and any time dining?

Also, please give us any other tips you think we need to know before our first RC cruise.

I have a group of 20 going on Harmony next year. We were all on MTD, but switched to traditional because so many people said it's much easier to get tables close to each other or even a really large table at the same place and time each night. I think 12 is the largest MTD table and there aren't many available.

Good luck

Thanks! I kinda thought traditional would be our best bet if we wanted to eat together. We usually split up into 2 tables but we're side by side.