I have endometriosis and used to take a lot of NSAIDs to manage my pain, but since starting blood thinners I had to look for other options. A tens device was recommended to me, but with so many different prices it was so hard to know where to start! I'm so glad I decided to check out this one. It's so small but it just works! I can wear it walking around its barely noticable under my clothes. I'm also able to use this device on my back on days when my endometriosis decides to hurt there instead, very simple. The controls are very easy once you do a quick read through of the manual, and I like that it gives audio feedback (although, very quiet). I'd recommend this over products that are more expensive for virtually the same thing. Plus, I like their customer service🤞