I was thinking of buying a the HHR by Chevy but my next door neighbor said that it had many problems .?

I mean does have problems like overheating,leaking oil or transmission problems? I'm talkin like major problems. I Loved it when I rented. The only thing that I thought that could have been better was the steering wheel kinda wobble a little bite. My last and finally question's are can it hold weight I have some BIG BOYS and a little one that needs to be in a car seat. And does it come with third row seating?