Merrily is good…but…temper your expectations.
My thoughts - regarding the production, not the material - Groff was very good, Mendez was good (though given to broad expressions and mannerisms to signal aspects of the character), and Radcliffe was…well, the least memorable of the trip to me. I thought the supporting roles were played/directed far too broadly. And the set? Ugh. An ugly white box. I doubt that will change.
Anyway - overall, I was glad I saw it at member prices downtown, but don’t feel compelled to rush back at the exorbitant Broadway prices. I suspect all the leads will be Tony nom’ed, with Groff a strong contender for the win.
Again, I recommend not to set your expectations too high (though with ticket prices this high, why wouldn’t you expect a lot?) and you should enjoy.