After reading about this last week from this thread, I tried the SnoozeCube on Thursday (Oct 20th) heading back to Cairo (long layover with CPT arrival at 05:40 and CAI departure at 15:30). I took one for 4 hours. Much better sleep than the lounge, because it's so quiet and dark. The cube was freshly cleaned, it's quiet (no announcements) and there is an alarm clock you can set as well as lighting and AC control. You get a fleece blanket (no sheets) and a pillow in a fresh pillow case. And a pack of ear plugs. Nothing else.
4 of the 10 cubes were in use when I entered, and only 2 when I left.
It's expensive, but for short timings, much better value than the airport hotel, and if you really want to sleep undisturbed, better than the lounge.
Just my experience, thought I would pass it on. Definitely for early morning arrivals with connections I'll make use of it again.