1 Up's www site has video know which helps but this is almost a you have to touch and use it product to fully appreciate it.
It's probably the ultimate for versatility in a few ways. It accommodates two receiver sizes with speed, elegance and surety. It shrinks or grows with same with speed, elegance, and surety. AL construction is light and stuff. Bolted construction means repairable. It folds for storage in as many pieces as makes sense.
I've had Sportworks (Thule), Saris and Yakima. If they make a 9 or 10 on the 1 - 10 scale you probably have to give 1 Up a 17.5.
Really pretty simple. You buy a 1 Up or you buy a Saris if you can't afford it.