I had the same basic set up I used on multiple cars over the years. Just needed to order new feet and make a few adjustments depending what vehicle they were mounted on. I started to hate the set up, was ok for short hops, but all day trips were not fun. Gas mileage plumetted, car was sluggish in performance. The aero's being worse than a semi trailer I am sure.
If you don't have a second vehicle, better than nothing.
Now I check to see if I can rent a bike at my destination or with careful packing, can get 2 bikes into my VW Golf wagon, as long as i don't need space for more than 2 people.