After seeing the TV ad listing the product as $19.99 plus a free can (just pay s/h) sounded good. I placed an order. Just before my card was charged, the site asked whether I wanted to "upgrade to bigger cans" for $4.95 additional. I did. By my calculations that's $19.99 + $9.95 + $9.95 + $9.90. At this point I thought it was getting high, but decided to go with it anyway. My bill ended up being $99.74!!! The products came out to $59.94 which should have been $29.89 and the shipping was $39.80 (really? for 2 cans!) which should have been $19.90. The kicker is - if the product DOESN'T work, you get $60.00 back, but not the $40.00 in shipping. That probably is how they make their money - overcharge shipping which actually pays for the product to begin with! I canceled my credit card!