I've got it in my CrewCab, fits real good, does what it should. I didn't realize how big it was when I first heard of it, it is a good design. It lifts up easy to clean the carpet. 2 Screws hold it in place. 10 minute install.
I've been thinking of selling mine to make room for a Sub. I 've got a storage box and tool boxes in the bed, so I've got too much storage space now.
If you're interested, PM me. I could get it to you easy during a CCT meet. Even mount it for you. Only about 2-3 months old, like new. $80 negotiable.
UPDATE: As suggested by baseballfanz, TitanSue (female type, not a he) is looking for the aftermarket item which is similiar to the Nissan OEM UnderSeat storage unit. My OEM unit list for about 140, I paid 110. The Du-ha list for about 180. Very nice unit too.