Thule 830 Stacker Kayak Rack
Crutchfield Customer Review (What's this?)
It's tough to beat this rack for the price. The rack installs quickly and easily (8 bolts on four attachment points) and worked well with my compact SUV's factory roof rack. Loading kayaks can be a two-person job, although the use of a couple of bungee cords made one-person installation reasonably easy. We carried two 10' kayaks at highway speeds with no issues whatsoever. Overall a very good rack. The trickiness of loading keeps this from getting a fifth star, but if you're looking for an economical multi-kayak rack, this is a strong choice.
Pros: Price, ease of installation, security of kayaks when attached, compact, attractive.
Cons: Can be awkward to load by yourself (my cure was temporary use of bungees).