Inexpensive household cleaner: "Bar Keepers Friend"

Have you ever used Bar Keepers Friend? 

It is an inexpensive household cleaner that contains the active ingredient oxalic acid, which works on soap scum, rust, and other stains around the home. There is NO chlorine bleach in this product which is great because I don't like my home to smell like a swimming pool...

I first heard about this product on TV when Martha Stewart was talking about how to keep your pots and pans shiny. (I haven't found any coupons for this product but you can purchase it at Bed Bath & Beyond and use the 20% off  BB&B coupon)

http://barkeepersfriend.com/

This may sound like an advertisement, or sponsored post, but it actually is not. This product has been recommended by (click to see list)  many companies.