GCN 
2007 Toyota Matrix Hatchback 4dr Hatchback (1.8L 4cyl 5M)
31-35 MPG highway
 Just purchased a 2007 base model w/ 5- spd, the "M Theory" package, and 36000 miles. Right off the bat got 31 MPG cruising at 77 MPH w/ AC on intermittently. Then cruising at 71 MPH on the way back w/ AC on full time got 35 MPG. So far I like the way it handles, the power is acceptable (but not sports car fun), but most importantly it a very useful car (parking, cargo, cost). "M Theory" is purely for looks, bright color but not worth extra $$$ for most.