We had a Poly Pro 3 for our 19 for 4 1/2 years, it lasted through Northern BC winters and southern Alberta winds. I have just ordered anther one for our Escape 5.0TA from Walmart. I would highly recommend them.
Doug & Eileen
2015 Escape 5.0TA
2015 GMC Sierra Crew 4X4 6.2 8 speed