Getting back to the original topic:
My main gripe with my Vibe(the Matrix twin) is the stiff ride. It transmits every bump, ripple, crack in the road to the body and hence passengers. I like a firm ride but this is a bit too much.
I'm considering doing something witht the suspension or just replacing the 16" wheels with 15" with 195/65 tires to put a little more rubber between me and the road.
On a minor grip my MT has two annoying points: the clutch grabs very early/low which was so hard for me to get used to (i.e. lots of stalls), and the shifter is too "notchy" not as smooth as I hoped a Toyota design would be.
But in general i like the Matrix/Vibe design - enough room and power, good driving control and handeling, and decent mpg.
--Paul