Shockingly good!
I've owned small Tens units before but never really used them. Why? Too many buttons to push and too small. They were a pain. This gem? Touch screen! All of a sudden this is easy to use. Touch the program you want  set the intensity (like setting the volume on your smart phone) and bingo, you're ready to go!  And the size? Just about the size of a small smart phone. Large enough for even my pudgy fingers to operate. They were offering a discount on Amazon, so I saved a few bucks too and to top it off, if you register, they extend your warranty and give you a promo code for 20 pads and a spare power cable for a penny. It's a great deal. Please don't buy them all, I still need to order another for my office!
Rating: 5 stars