They work!
I used these for my slendertone flexpro arms after getting tired of spending so much money on their pads.  This is two sets of pads for a little more than one set of the name brand pads.  These pads are noticeably thinner than the name brand pads, but they work just the same.  The stickiness could definitely use some improvement as they do not stick to the device very well causing you to have to readjust them every time. This is a minor inconvenience for the cost benefit which is why I gave 4 stars instead of 5.
Rating: 4 stars