I'll start off by saying that my Frontier has over 175,000 miles on it. I bought it brand new in '00 with 10 miles on it. It is now one of my work trucks. What a fantastic truck it has been. Not the most powerful, doesn't get great gas mileage, isn't the roomiest, but damn, this thing is reliable. Other then tires, oil, and brake pads, I've only replaced the timing belt at 120k miles, and one A/C hose at 160k miles. I highly recommened this truck for people who need a good used, long lasting, dependable truck at a great price on the used truck market. By the way, mine was not babied at all. It pulls a heavy work trailer on a regular basis, and only gets the oil changed about every 10k miles.
Reliabilty. Very low cost of ownership. Not bad looking either.
I wish Nissan would import the diesel powered ones here.