I have used a dolly for 13 years, have a Master Tow and tow different cars. We have a T&C van and it is wider than the Olds van we used to have, so make sure you get the wide one, mine has electric brakes. I also tow an HHR, it just depends how many are with us as to which car we take.
As for the dolly itself I don't have a problem with it. I've got it down to a science to hook up and in about five minutes I'm rolling. I also carry extra straps just in case.