I got my Xterra S used and love it. The V6 engine is powerful and the ride is smooth and quite. The exterior styling is really nice looking.
The interior is pleasant looking and roomy, but very minimal. There are lots of plastic panels and very few bells and whistles you would expect. It would be nice to have more features. The biggest disappointment was the terrible factory sound system. One of the first things I did was replace the radio and speakers with an aftermarket system.
The rear cargo is very nicely thought out with adjustable tie downs on the floor and roof, storage under the floor, and rear seats that fold down flush making lots of room for dogs or hauling. Cleans up nice.
Strong engine, nice styling, great cargo area.
Improve base sound system. Add more features and refinment inside.