I finished the whole series in about three days, it's that good. (I also wrote old-school longform recaps on my website, if anyone is interested) The music is mostly new stuff, past 10 years basically, but it only plays in the background, there's no full "song sequence". It's what you would expect, the stuff that would be playing at a wedding dance party.
I was hoping for some big name cameos, but I think the biggest name was Deepti Naval in episode 3. All the actors in roles large and small were amazing, but it might have been fun to see some really big names pop-up. Maybe next season.