twocruzin 
2009 Toyota Matrix Hatchback S 4dr Hatchback (2.4L 4cyl 5A)
Harsh Ride Has Gotten Better
 No problems with this car in the 15 months I've had it.  My only complaint is the way it rides on those low profile tires (45's).  I think I have finally figured out the best air pressure for the best ride at 4k elevation.  I've gone from the recommended pressure of 32 psi up to 35 and down to 30 and then 28.  At 28, the ride was pretty good, but you could tell the tires were a bit soft as the handling was just a little mushy.  Plus it's not really recommended to go that low as the tires can heat up excessively and cause a blow out.  All this said, I've now gone to the other extreme and am running them at 38 psi, and this actually is the best yet.  I think I'll leave them there.