The first act is a bit rough and this certainly isn't the most original film on the planet but once you get past that, Ma is actually a really damn entertaining thriller. It's clear that Octavia Spencer was having the time of her life with this role and she gives such a bonkers performance that's refreshingly against type. The supporting cast around her is actually quite solid as well especially Diana Silvers and Juliette Lewis. The film also does a surprisingly good job with balancing its tone, there's certainly scenes that were incredibly suspenseful but there was also a handful of scenes that were really funny. If you're looking for some solid summer thrills, this'll probably do the trick.