The only thing I've done so far is a short stent marketing so it wasn't a good test. I have been having more pain and stress in my lower back where the injection was. I have an injury there so I think the process irritated it and now ice is the only thing that makes it feel better. After I have the 3rd I'll try to fit in my one-stop-shopping at Walmart and that will be a good test to see how they're working.