The best place to find AUTHENTIC reviews on Goodman furnaces is the Goodman’s own website.. This is because Goodman uses an impartial 3rd party to collect and authenticate furnace reviews. Unlike any other website on the Internet with furnace reviews, Goodman has a list of ACTUAL buyers. Goodman knows who actually bought and which furnace model they bought. Only opinions of real buyers are requested and counted. Check furnace reviews on Goodman’s site.