I haven't been able to park uphill for years until now! I tested the last one on a steep slope on a very rainy and slippery Christmas night. Brake, reverse, accelerate a bit, holds like a master! I thought it would pass but no! I felt like I hit a curb and my Volvo didn't move. Because it's black, it's less likely to be plucked. Now I can sleep at night. BUY NOW! I get 2 more just for fun and extra gifts ;-)