Okay because of lack of alternatives...
Pulai Desaru Beach is a nice Resort with nice facilities and quite a nice beach, good food.
Given the price, the room is big but a bit run down. I had some bugs running around, toilet flush didn't work and balcony furniture not clean.
It seems all the few Desaru Resorts have similar problems, so I can still kind of recommend it (if you really want to go to Desaru). Additionally, the access by bum boat from Singapore is a bit difficult. If you can, book the Cruise Ferry (Changi Ferry Terminal), +65 62148031.