Wife had one, biggest pile of junk we ever bought.
Constant mechanical problems. Trans cooler lines leaking by radiator connection, pistons, timing belt, cracked manifolds, cat converters, fuel pump.
Last thing was the cat converter, it was clogged and needed to be replaced. At the time it was there they said it needed new pistons and rings due to oil blow by. Was using a quart in about 1500 miles at the time.
They would not cover the cat under the emissions warentee. I guess that oil going into piston and down exhaust is ok for the cat. Conv. according to GM engineering dept. That's what GM customer service quoted me on the phone.
One thing was fixed and something else would need to be fixed 2 weeks later.
It was maintained by a large well rated Chevy dealerships every time. Granted it was warentee work, but big issue was too much time in the shop.
When driving down the road there was a lot of road noise. BUT I will admit, a lot of room for adults to sit comfortably.