The first day I had my new pair of Ugg slippers, I sadly spilled a big glob of lotion on one of them.  Out of panic, I scrubbed the spot in the sink, a big no-no with sheepskin leather.  I had definitely left a noticeable spot on my slipper.  I then went online and purchased this product and cleaned my slipper per package instructions.  While it didn't clear the stain 100%, you can barely tell where the original spot fell.  I like that the kit also contains sheepskin protector (which I used immediately after the initial cleaning), as well as a deodorizer (I don't use this religiously, but only once in a while).  If you're going to invest in Uggs, this little kit is definitely worth purchasing.  ** I wanted to add an update to my previous review.  I've had my Ugg slippers for about 2 years now.  Last week, I took a pizza out of the oven, but it slid off the rack and fell right onto my right slipper.  I just about cried looking at the mess of greasy cheese and red sauce all over the shoe.  I busted out this cleaning kit, and I kid you not, after a couple of days, you could not tell which slipper had been soiled.  It's pretty amazing.