Two months ago I bought a 2016 Kia Sportage from Hertz Car Sales in Winter Park Fl. (got great deal too!!)
I rented a U-Haul Dolly there and towed the SUV 130 miles home with my 2004 Chevy Silverado X-cab. SUV stated weight is 3300 lbs.
I drove semi's (all variety's) for many years but never used a tow dolly.
The SUV towed like it wasn't even there! A couple times when looking in rear view mirror I was startled thinking why is that guy following so close!
I ran 65-70 mph though the dolly was marked 55 mph. SUV wasn't that heavy and dolly had 12 ply tires so I felt safe.
The dolly did not have surge brakes.
Just an after note- with the tire straps, vehicle safety chains and ramp storage/securing make sure you double check everything!