I've got clips and the extentions to use this with both our Honda Civic 2004 coupe and Subaru Legacy 2007 sedan. I have fit 3 snowboards on the rack for long trips, and the most i've ever thrown up there was 2 snowboards and 2 skis. The Civic could barely move with 4 riders/skiers inside and all our gear. But this rack helps move those big bulky skis and boards around if you've only got a car to work with.
Also, the only reason I wasn't able to fit 4 snowboard onto the rack is because the boards on the bottom, when flipped upside down, the bindings get in the way. For my cars I don't have enough clearance between the rack and my roof. Solution...take off the bindings! Never had a need though.
Overall, awesome product, high quality. Drove my car from New Hampshire to Washington with my board up in the rack. No problems. Has held up over many seasons. And the locks definitely give you comfort when you've gotta step inside the gas station for a snack.