I am really enjoying my Hummer H-3. Seating is very comfortable and has superior headroom (I'm 6' 2"). I also like the styling. It turns heads and draws favorable comments practically every time I drive it. Nice interior. The Hummer pulls strong with a trailer. Handling is good too. Mileage around town is 14 mpg, exactly as advertised. Haven't had it on any long trips yet to check the open road mileage but I expect 19 to 20 mpg. It doesn't have a lot of "punch" acceleration from a stop that I had expected from a V-5 engine. However has plenty of power, even when pulling a load uphill. It is in constant 4WD. Would have preferred a 2WD capability that likely would have improved gas mileage. Driving comfort is what you would expect from a vehicle with off road potential, just a tad stiff and bumpy but much better than the Jeep Liberty that it replaced. You can shut the engine off and remove the ignition key while the Hummer is still in gear. Then it will roll forward or backward if you are parked on even a gentle slope. Unless the H-3 has the tow package option you will need to have the vehicle wired for towing electrical connections if desired. There isn't a 7 pin plug connection unless you have the towing package option. Wife loves driving it too. Her usual vehicle is an Accura TL.
I BOUGHT MY 2006 HUMMER H3 A MONTH AGO & I LOVE IT. TO MY SURPRISE I GET VERY GOOD GAS MILEAGE & IT RIDES VERY NICE. SOUND SYSTEM IS AWESOME. THE HUMMER HANDLES VERY NICE.
What a excellent vehicle! It has a substantual feel - very solid. For a four by four the ride is very good. Excellent space for others and gear. It has to have the best stock stereo system ever. It will blow you out! Off road, it can handle more than I feel comfortable trying to drive over. Would like a little better milage per gallon, but all in all, I would not want to drive anything else.