I have owned several TENS machines over the last 15 years following a serious back injury and this is the best I have found. TENS Machines Australia (also trading as First Aid Kits Australia) are wonderful to deal with. I always prefer to deal with a local company if possible as this provides jobs locally and makes follow up much easier. The service was very prompt, so important when one is in acute pain. The machine is great value, excellent quality and the inclusion of so many pads makes it really versatile. This unit makes it possible for me to continue working and manage my pain using less medication.