I expected more of a thriller or mystery based on the synopsis I found, but the movie ended up feeling more like an archival of a woman processing her grief, mostly alone. I'd rate it a bit lower as a mystery film or thriller.
The pacing is slow, deliberately slow. If you want to be on your phone while watching, this probably isn't the right movie for you. The actress is the only character on screen for probably 90% of the film. I really enjoyed the sound directing, and the cinematography was overall decent. The dialogue was awkward in a realistic sort of way. Acting was fine. The story was okay, but I never really felt captivated. I didn't love the camerawork or camera angles a lot of the time.
Really challenging for me to rate. I may have rated higher if I wasn't currently processing my own grief.
Leaving a (rare) review since nobody reviewed yet. Hopefully this helps somebody.