 I bought the 09 Frontier back in August of 08 and since then I have put 23,000 miles on it so far.  It gets really good gas mileage for it's engine size I average about 18 or 19 basicly I fill up when it gets to 1/4 tank and I have driven about 325 miles.  It's really smooth on the highway and offroad the handling is second to none.  The hill descent feature and hill start assist are really great options to have esp in the winter with snowy conditions.  Overall just a great truck that can fit four people comfortably on long trips.