There are so much better vehicles other then the H3.
And they were sold with a 5 speed manual (which always helps truck fuel economy).
"I owe it to myself, and to my choir students, to not be upset about barns."
I'm not sure about all the hate in here. It's a handsome, good-sized SUV and should be reasonably reliable if you're not taking it off-road. The I5 isn't fast, but then again, neither is any of it's competition and these aren't fast SUVs like Cayennes. The mileage is basically the same as its competitors as well. Cheap-looking (read: durable) interiors are the norm in this segment, so that should be no surprise.
If the size of the H3 suits you best, I can't see any reason not to consider one.
If you buy one, you MUST read this! Addresses all the weak points in the drivetrain. Also, all GM IFS are weak when put under stress.