It's a good map, and excellent quality - BUT with a big limitation.
The GM map is the only one that shows the details of the secret rooms, but it's also got room numbers and secret door symbols throughout.
This means if you're porting it into Foundry or Roll20 or whatever, and you put the players on the player version, they can't see the secret rooms when they access them.
Equally, you can't really put them on the DM version without revealing all the secret rooms and having all the room numbers on it.
And the VTT version doesn't have any props and is just a space, which is... not overly helpful.
It's still worth a buy, but this seems like a functionality oversight.