I use the nylon tie down straps, but only use the 10,000 lb rated ones. The 5K ones are too flimsy IMO. I tie down the back of the car using the factory tie downs. They are attached to the rear frame rails. If the car does not have tiedowns, i use an axle strap around each side of the rear axle. I tie down the front by wrapping an axle strap around the lower control arm on each side. I dont like loading the front suspension down while trailering. Thats 4 tie downs (each corner) for the car. Just my way of doing it, been trailering Mopars for years and have thousands of miles towing with no problems. Inspect your straps regularly, and replace them when you see any fraying and you'll have no problems. It's important to make sure the tie down straps dont rub anywhere when you have the car tied down, so they wont get damaged. Don't cross the straps either, I used to do that and found out that the nylon straps are designed to be strongest in a straight pull, not angled. Every 100 miles or so, get out and ratchet down on the straps to make sure they stay tight, as they will loosen up a bit as you go down the road. I always tighten them up after the first 10 miles or so, then every time i stop for fuel or food. I also check my safety chains, tow rig hookup, and all the trailer and truck tires at every stop. I also use an equalizer bar setup and sway control. I wont skimp when it comes to towing equipment, i figure if i have over $100K invested in the car, trailer and truck, i better have not cheaped out on my towing equip.