I'm already over 1000 miles, as I bought it to be my daily driver and I have a 150 mile round trip for work each day. Overall average of 29 MPG, so I'm quite happy so far.
I actually ended up buying 3 new GM vehicles within a weeks time, bought a new Equinox on the 15th of July, then found out there was an additional $1500 incentive for having an Equinox in the household, so I started looking at the Colorado that I have been wanting to get, then the dealer told me the diesel one on the lot had the Dealer Tag money on it for additional money off, so that was all the extra incentive I needed to go along with with my discount price to pick it up. I also ended up picking up a new Cruze for my son to take to college since it was a good lease rate and also able to get the extra dealer tag money on that car along with the Equinox in the household incentive.
I like the Colorado the best of the 3 new vehicles, but also still have my 2000 2500HD Chevy to take care of the heavy tasks + it has an 8ft bed when I need a bigger bed on a truck.