Not too long and not too short. Some scenes repeated themselves a bit but in hindsight I think this added to what he was going through in the box where days are all the same. Liked the camera work with the varied shots. Given this was a film about a man in a box it could have been really easy for them to put the camera on a tripod and just film but not the case. Without spoilers I think the only way the budget was betrayed here was with the ending but it still didn't take anything away for me. Love Matt's books and it is nice to see him getting further involved with films.