Well these pads are as heavy as can be. Some might like it, but if you order 3 like I did, expect to almost break your back trying to lift the box. slide them out and pull them out one by one. Absolutely useless. I have no idea why they contain such a short yellow rope. For a standard car, the rope is 2 feet shorter.2. stop power. They work, but they work mostly because of the size. As for stickiness, ma'am, I don't know. You know you have them when you try to start the car to test them and the car doesn't move - so they work and I use them on 3 collector cars to keep the parking brake off.3. Looks like it is again, but very bulky and heavy.4. Bulky and heavy - did I mention that?5. The rope is too short - yes fix the fixed that makes it - so I don't have to do my fashion. Terrible.6. Efficiency: 100% so far. I have a 4,500 pound car that I forgot was "loaded" and tried to reverse. Luckily they were there and stopped me.7. Great for long term storage if you intend to use them every day look for another brand - just a very heavy rubber.