I was very satisfied with the Village, Haunted Mansion, and City map packs and recommend them to all - even remotely interested in them. But the Sewers Map Pack is very disappointing. It's unfortunately less quality than free photoshop made sewer tile collections on the internet.
The tiles are repetitive and the rooms extremely bare of any detail. The most important sewer tile set of all was not to be found - the actual sewer entrances/grates, etc.
This isn't the Map Pack you're looking for, move along to the other Map Packs.
