The trunk mounts work fine as long as you take the time to attach them properly, I've used them in the past with no problem. They usually need retightening once the bike is actually mounted and strapped in. Then pull over once or twice just to check if anything is coming loose. Again, try to stick with a name brand for quality construction . . Yakima's Little Joe is a good one for about 50 bucks, carries up to 3 bikes.