It's ok but hasn't really done what I'd hoped...
This product is ok, but didn't really work all that well for me.  Not totally bad or anything but I can't say it was any miracle or that it helped me all that much.  And why doesn't it some with instructions?  I too didn't know what the two black pads were for until I read some of the questions and answers here and found out they are for under the arms. Subsequently the pads were of no help in my opinion; way too bulky. Again, it's an ok product (seems well made, too) and maybe it worked well for some but I wouldn't rush to buy another product of this sort.
Rating: 3 stars