I tow a Jay Flight 24RBS with my Porsche Cayenne S. I upgraded to a Propride 3p hitch after the first couple of tows. Amazing setup. I think setup like it is it tows better than a lot of trucks. I've done a lot of towing before with a diesel truck and still would say that.
I have Touareg TDI and my trailer is about 5,500 loaded and I don't any problems at all. Been up the Grape Vine at 55mph and it runs at 3,000 rpm. About 35,000 miles towing with it and would never consider using my truck and I have a GMC.