I liked the first season and am absolutetly loving the second.
In the first season we get some really oldy musical vibes from the 1930s to 1950s. Falling in love with no sense what so ever ... and lots of frills, pastels, and plastic trees. And what else would you want?
In the second season we find our selfs in more reasent years and musicals. Like Hair (70s) and Sweeny Todd (00s). It becomes a weird mix of the dark streets of 1800s London, the smoke filled lokales of 1920s Chicago, and all the flower-power you can handle from the 1970s (actually a bit more than that, to be frank).
The songs and dancing numbers are (at least in my opinion) well written, and well performed by the actors.
If you plan to watch this, do so with an open mind.
This is not meant to be a masterpiece. But to entertain and make us laugh.
Which I think the creators and the cast succeeds perfectly.