Staff said I wouldn't be able to see or hear anything. That wasn't true. After I switched off the light, I could still see the power switch on the shower, the display on the radiator and the light coming in around the door. These reflected off every surface so I could always see all around me. Even though I wore earplugs and my ears were under water, I often heard banging and thought it may be the knock to tell me time up. Some black grout. No conditioner or hairdryer diffuser. Won't go back.