Watch out!! I read a piece in Sea Kayaker magazine recently that showed what can happen if you don't secure your kayak on your rooftop with a bow and a stern line, in addition to the two straps on the rack. I use a nice Yakima rack costing $400+. My bow line was a good quality kayak strap with a buckle. On the way home with the boat two nites ago, I fastened the bow line to a secure part of the car and had 5-6 feet of excess strap. I coiled this and secured it to the strap with a knot. While driving, the excess came uncoiled and dragged beneath the car. Suddenly my kayak was pulled down violently and sprung back. The pull had bent the kayak like a banana causing numerous cracks right thru the hull. I totally ruined a Delta 18.5 Sport costing $2500+. I think my homeowners insurance will cover some of it. Beware of ANY excess straps or ropes. PS. I bought a three year old used WS Tempest today for $650 and paddled it today. ===Sadder, Poorer and Wiser.