Life long full size pickup owner here, but decided to commit to reduced fuel use. I parked my full size pickup and purchased this for a work vehicle. I farm for a living, and I was thinking of a Tacoma, but was not sure the mileage would be good enough to switch, so decided on the Matrix. Fuel mileage is 30-32 so far, on 1000 miles drive, with short distance on and off pavement driving. Loads of fun to drive as well! I couldn't be happier!
Fuel mileage, hands down. I have not gotten less than 31 mpg yet, and I drive a lot of small trips, and into farm fields with low speed driving. Small light easy to fit into tight spots, fun to drive. Roomy interior, I am 6'2" 235 lbs, and am quite comfortable.
Reverse is a bit high geared, and the throttle is a bit touchy into first gear. It might be a bit tough if you drive in the hills a lot. I hate the seat belt dinger! It drives me nuts! I wear seat belts, but am in and out a lot, this thing is driving me crazy! They need to tone it down a bit.