I've owned my unit for several years now, and I can honestly say that not a single day goes by without me using it. Every physician I've seen, from specialists to my internist, knows that I rely on it, and they’ve all been impressed. Just today, I mentioned it to my rheumatologist, and she was visibly impressed, saying, "Good for you, it sounds like you take very good care of yourself." I replied, "I do, because no amount of money can bring the happiness that comes from being healthy and strong!" If you’re on the fence about investing in this unit, let me tell you: you will thank yourself every single day for making this choice. It’s an investment in your health and well-being, and that’s priceless. Carol S.