I'm a fan of both the OG manga and anime so I have some specific and biased opinions based off of those comparisons.
It's cute and fluffy enough to keep most romance-lovers entertained, especially those who are not familiar with the source material. For those who are, there are absolutely some things that may be lacking (as they were for me).
The lead actress plays Sawako well, but is absolutely gorgeous, at no fault of her own. However, Sawako is supposed to be a rather plain and ghostly-looking girl, with much of the plot pulling from that. Kazehaya is supposed to be extremely charismatic and I think they could have portrayed that better.
Larger than these smaller nit-picks though, is the humour that I feel was completely lost from the manga and anime. There were many truly adorable and funny moments that were lacking from this live-action adaptation. The attempted light humour that does exist in this version doesn't hit the mark for me at all.
If you're looking for a light and easy endearing high school romance, it still works. But if you haven't seen the anime, watch that first!!! Or even read the manga if you're feeling up to it. The anime is on Netflix though, so easy-peasy.