I really liked the general idea, but it lost it's magic halfway through. Maybe even earlier. Also the soap opera elements kept creeping in, which didn't help. Unless you are into this sort of stuff. So while there is humor and mystery surrounding the whole thing, the romance and the relationships developing do not get clouded by the "whodunnit" of it all.
There are some nice gimmicks (the "Sherlock Holmes" prediction thing, even name checked sort of early on in the series), but they also get "old". Then there are the flashbacks and the timeline switches, some of which might annoy some of the viewers, depending on the investment in the characters. The music is nice (pop), but the themes also get tiresome at some point, especially if you binge.
If you think I'm unfair in some regards and like this more, I am happy for you though. Not saying this is something bad, but the flaws led me to go with the rating I chose