I recently purchased a set of solar panels from costco (canada), was a bit leary due to the cost compared to a similar size from the local pool store. Costco 4' x 20' panels were $249, compared to pool store price tag of $599. http://www.costco.ca/Browse/Product....895&lang=en-CA
I have the units installed, and after some modifications to the manufactures instalation instructions I am pleasantly surprised. I have been gaining 6 - 7 degrees per day for the last 2 days (Sunny and 23 deg. and 22 deg. days). So while probably not as high quality as the local pool stores unit, still a good "VALUE" product.