Saw this a few weeks ago and while I don't know that I'd over all consider it a good show, I found it incredibly entertaining and it felt like a fresh take on the bio-jukebox musical, an artform that seems to grow staler and staler with each new artist plopped onstage. Is the framing device entirely successful? No, but I appreciate that the team is trying something new with it.
Groff is, quite simply, a true Broadway star. He is one of the most--if not the absolute most--charistmatic, charming, utterly winning leading men of this generation and it was a delight to see him in a show where he is clearly having the time of his life. Does the performance match up to the level of his performance in Merrily? No, but the material isn't asking for that. It's asking him to sing, dance, and sell the show as best he can, and he's doing all of that and more. It was a sold out house when I went, including standing room, and you could feel the entire room falling more and more in love with him as the show went on. He sounds phenomenal, dances up a storm, and looks gorgeous (god bless the speedo).
The supporting cast is all in rather thankless roles but perform well even if their voices aren't the strongest (Bergl and Pawk may not have the most flexible pipes, but they are committed to their roles and bring a certain heart and warmth to it all). Gracie Lawrence sounds amazing in a very thinly drawn role. Erika Henningsen probably fares the best of the supporting roles, bringing her crystal clear voice and grounded-ness to the stereotypical sidelined wife role.
The book isn't great but I don't think it's bad overall. It's merely sufficient at bringing you from one song to the next, would probably be much more successful as a sort of concert-musical like Lady Day where Bobby Darin recounts his life and brings in the key players from his history. There are some groaners and some moments that should have been cut (and may have consider I went to an earlier preview). But I was entertained start to finish.
The set, lighting, and costumes are all pretty first rate and have Timbers's signature visual flair. The set is not overly flexible, but it looks stylish and expensive.
I think if you're a fan of Jonathan Groff, it's worth seeing.