I found to be kind of weak as a musical. It's definitely not Damien Chazelle's best movie. That would be Whiplash.
La La Land was an OK movie. It's kind of sappy and pretentious but I enjoyed it. The City of Stars song was catchy and stuck in my head. I'm still not sure why it won so many awards. I guess because most voters live in LA and industry people love movies about the industry.
Of the Oscar nominated movies I thought Arrival and Hacksaw Ridge were better.