I purchased the extended model to fit my Chevy Traverse. It was fairly easy to assemble and took about 20 minutes to mount to the vehicle. The included hardware fit my SUV's crossbars snugly. My only complaint is that one of the screw holes on the extension assembly stripped out fairly easily. It was not over-tightened. The others are snug and I was able to replace the nut in the tube with another I had around my shop. It's a good deal for the price - I would purchase again.
My husband assembled it quite quickly without any problems. It is spacious enough for all 5 of our (not full sized) suitcases with some space left for smaller things. Drove over 1500 miles through many different terrains (no off roading) and had no issues. Rained some one day while driving and nothing got wet. Pleased with the purchase, made traveling far with our suv an option.