you should ask for a review after a few months of use. I cannot truthfully give a rating very high when I just installed the unit. I give the one star for only listing your high ratings (questionable) and that this is the only time I can give a rating. You have no direct link to ratings on your main page. Shame on you. You have an excellent product, but rig the ratings. (MD NOTES: Thank you for your concern. We seek reviews, good and bad, and post them the same. Studies show that happy customers tend to post reviews a lot more then less satisfied ones. When someone wants to post a review for any of our products they can locate the product's comments and go to the bottom of the page for the review form. Here is the page for Flo-Master. http://www.builtinvacuum.com/productRatings/viewRatings.php?product_id=1752.)