Kitchen Boy
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Wife and I were kinda hesitant because of the price but honestly, it's pretty good value for what you experience.
We visited on a late August Tuesday and while there weren't as many staff as may have been on a weekend, it was still very informative.
There's a lot to see, you can easily spend most of the day here. We spent 3hrs here and while we hit many exhibits and staff demonstrations we didn't do everything possible.
There are self guided buildings and many with staff educational assistance. These folks are passionate and knowledgeable about the history of Mystic seafaring history with a particular focus on whaling but there's so much to explore. You can see how people lived, shopped, ate, cooked and worked all focusing on the diversity of life around a sea community.
I'd return again and try to hit the planetarium if nothing else.
This is definitely worth the time.