About ten minutes in, I thought this was a duffer. I hated the voice outside of the box and the protagonist (who also wrote and directed it) wasn't really my cup of tea. It was taking me out of the moment and stopping me engaging, until.... it didn't. I suddenly found myself an hour in completely in the zone. I'm not claiming that it's incredibly well done or executed, because in a lot of ways it isn't. It probably didn't have a lot of money in its defence. But it pulled me along for the ride and I never got bored, which is impressive for a single person / location film. Not a bad time from Matt Shaw.