So my husband and I bought something, and shared our result with others on here, and its advertising? You are right, it's biased, because we like it and are thankful we don't have to defrost anymore.
Maybe this is different than other forums we have been on. I saw the above poster reference something they had tried, so we did the same. (the can do it, and we cannot?) It's not like we are made of money being on a fixed income. We simply stated that it bothered us having to spend money on the fan from
Ebay and we found the thing that we bought worked good for us.
We have been rv'ing on and off since 1975, and find the suggestions and cautions from other fellow rv enthusiasts to be very important. Are you the guy who makes them on Ebay? If so, I am sorry if my comments are upsetting, they were not meant to be.
Take Care-
PS, you really should make it up to see that train in St. Joseph, it is huge. My husband looked like a child standing next to it.