Nicely designed, this map give the perfect flavor for the arena my players are currently trapped in.
I am running a long-standing 4e D&D game, which makes the grid useful. It is a bit small for 4e style combat considering range and movement, but it would be easy to split the existing grid squares into 4 to make the arena bigger. 5e DMs and other gridless system users can still enjoy this map easily. (A useful addition from the map maker might be to provide the map twice, once with the grid and once without it).
This map download is a PDF, so if you are planning to import into some place like Roll20, you may have to do some technological finagling to get the picture and then import it. If you are printing it for table play, the map will print on a 8.5 x 12 piece of paper.