Let me get the (very mild) negatives out of the way first:1. The 9 volt battery that ships with the unit is only good for about a day. Do yourself a favor, and get a four-pack of rechargeable 9 batteries and a charger when you place your order. That gives you one in the unit, one in the storage hole in the case, and two in the recharger.2. The gooey adhesive that sticks the electrodes on your skin will come loose if you sweat a lot, as I do in the Georgia summer heat. They sell replacements, BUT that gooey patch is ALWAYS going to come off. Fortunately, with the help of my physical therapist, I came up with a cheap, easy fix.3. This will NOT permanently take your pain away! If you think ANYTHING will, you are mistaken.HOWEVER: (And these are the VERY good points)1. This unit absolutely WILL interrupt the pain-feedback cycle for some types of pain! I have some degenerating discs and a chronic pain condition, been under the treatment of specialists for just over 15 years now. Even massive doses of opioids won't take some pain away. I developed some pain in my hip that ran down my leg, and it was keeping me from sleeping at night. I would have to take an entire day's supply of NORCO to sleep, leaving nothing for the day. My physical therapist showed me how to break the pain cycle with a hand massager, but the good one cost $300. We gave this a try, and IT WORKS. I can wear this outside, and have; you just have to run the tires so not to snag.2. A few minutes of the unit breaks my pain cycle, and I'm good for anywhere from half an hour to more than an hour. If you don't live with chronic pain you won't understand how lovely that is!3. There are TENS belts for sale, but nothing really looked right to me, and they were kind of pricey. Kendra, my physical therapist suggested using an ACE bandage to hold the electrodes on. I took that idea, and expanded on it. In the picture, you see the two black electrodes on the left? They are more-or-less permanently attached to the ACE bandage, AND it's a work in progress. I sewed the edges of the patches to the bandage at first, but found I hadn't allowed for the stretch, and the placement of the patches was too far off. I was working out in my shed at the time, and just used what was handy, which was some wire. I suggest you experiment with some small safety pins. I call the result my Kendra Belt, in her honor.With a little fiddling, I can place the patches where they will work, and I just tie the bandage around my waist or shoulder. NOTE: there are some places on my back that it's really hard to get the patches on, because of the way I'm built, which is not a perfect cylinder, and I'm also furry. Perhaps some of the commercial belts do a better job.If it's not easy, you won't use it, and I found positioning the pads not to be easy. The Kendra Belt is easy, and CHEAP! It rolls up, and stashes inside the hard carrying case the unit comes in.