Grimy procedure-for-money horror has a lineage going back years, and this one wears it in the open. The bureaucratic dread of doing a job badly. Tools far to industrial for the task. Money as the only reason you're still stood in the room. Saw, cut, electrocute is a great verb list. The tone lands before you've worked out the rules, and that's the point.
Shock premise, small execution, and to its credit it doesn't pretend otherwise. Beyond the loop of taking the next patient and doing something awful for cash, there isn't a great deal here. The loop is tight, though, and the presentation carries far more weight than any of the systems. Come for the atmosphere. Don't come looking for depth.
Not for me. Ten seconds in I knew exactly what it wanted from me and I wasn't in the mood to be the one holding the saw, least of all at that hour of the night. It does the thing it advertises and does it well enough. Being complicit just gives me nothing.