I bought some a few weeks ago and I was very impressed. I have hard water, and it helped remove some of the hard-water stains on the door of the machine. I also use high-quality powder detergents, I use very hot water often, and I also leave my door open until the machine is completely dry. The machine still can develop smells, though, or at least smell like laundry products on occasion.
My LG looked and smelled brand new after using it the other day on the Sanitary cycle, and I'm very impressed!
Just my 2 cents -
Bryan