Well, I gave it a 10/10, so it must be good
Since you ask...
First and foremost, La La Land is a musical. It's a modern musical. It's the first proper non-Disney musical there's been in yonks. If you don't like musicals, then you might not like this film.
The plot: an aspiring actor (Emma Stone) and jazz pianist (Ryan Gosling) meet in L.A. and fall in love. They both have big dreams that they are unable to make happen; Stone is working as a barista in the Warner Bros. lot and keeps being rejected from auditions, while Gosling is stuck in a job playing Christmas songs in a bar. When the two meet, they begin to realise these dreams - but will their relationship endure?
The songs are quite catchy, and the singing is above average here too. Stone and Gosling aren't Fred and Ginger, but then they're not meant to be. The acting is very good. If Emma Stone doesn't win Best Actress for
La La Land, then the entire ceremony must be a sham. She is amazingly good. And Ryan Gosling grows on the viewer and plays off Stone well. This isn't their first film as romantic interests (
Crazy, Stupid, Love with Steve Carell was), but they work very well together.
In short,
La La Land is not afraid to dream, and deservedly so. This is something new, something that Hollywood has not seen before...and I love it. Whether you will obviously comes down to you yourself, so I'll stop here.