Our main character at one point says "breathe, breathe" ... which is kind of ironic considering the title of the movie! That aside, the sequel works if you can suspend your disbelief in more than one way. One of the things you have to be aware of is the role/character Stephen Lang is playing.
Now I do assume you have seen the first Don't Breathe movie, even if this also works as a standalone of sorts. It does continue the story from the first one or rather picks up where the other one left off. Before it does leap and jump into the future (few years ahead).
So if you can dig a bit of a transformation of Langs character and can forget the evil he has done ... at least push it back and don't hate him that much .. the movie sort of works.
There is a lot of violence, most off screen, but we do get to see a lot horrible stuff. Not for the faint of hearted for sure. And an expected bonus scene after the credits (if you know one is coming) rounds things up ... sort of.
