My daughter and I rented a 'nap room' in the world's busiest airport. Our experience was close to perfect.
We got pillows with disposable covers and blankets.

The attendant gave us a quick tour of the communal restroom, which looked spotless, and then led us to our suite. She reassured us she'd knock on our door 15 minutes before our allotted time was up.
She also offered us pillows with disposable covers and a set of blankets, which we gratefully accepted.
Though I would've preferred the pre-packaged airline-style blankets, I reminded myself of how many laundered hotel blankets I've used over my lifetime — and used it anyway.
Fortunately, the blankets felt clean and soft.
The suite was well-appointed and laid out.

The suite was minimally outfitted with a desk, chair, and a daybed with a trundle.
It also had a Samsung Smart TV, which allowed guests to log into their Netflix and Amazon Prime accounts.
It was surprisingly easy to get some rest.

We dimmed the lights, adjusted the thermostat, and told the in-room Amazon Alexa to play white noise.
Thanks to a sound-masking system, it was remarkably quiet in the suite — we could still faintly hear attendants knocking on neighboring doors, but we eventually tuned it out.
It seems we tuned the noise out a little too well because the next thing I knew, my phone alarm was going off. We'd both fallen into a deep sleep.
Though the attendant said they'd knock on our door 15 minutes before our time was up, neither of us heard them do so. They may have forgotten or not knocked loud enough — either way, I was glad I set an alarm.
Feeling surprisingly refreshed, we collected our belongings and headed to our gate.