Part supernatural mystery, part young adult thriller, the movie manages to work them together into an enjoyable story. I Still See You has nothing too groundbreaking, and the story leads you along without many surprises, but it is a fun ride.
The acting is nothing to write home about, especially from Bella Thorne, but they're not terrible. Dermot Mulroney actually puts in a surprising amount of effort and sells his part. Richard Harmon reminded me of a less jaded version of his character on The 100, but I'm not surprised.
I enjoyed the pacing. Starts off slow, and gains a nice build until you reach the conclusion. All the right parts in all the right places.
Overall, I found it to be satisfying, and it was worth my time to watch. I wouldn't precisely call it a Must See Movie, but it shouldn't be ignored.