Cool concept - I have been thinking about something similar but for mechanical rather than electrical cardiovascular signals. One problem I foresee with a direct-to-consumer device is that I'd think most people would need such monitoring rarely, perhaps every few months. Have you had any users who use it more frequently? Athletes was one I thought could be a good target niche. I'm curious if you could describe the users who buy your product and how they use it (frequency, what changes they are looking for, is it for disease management or prevention)? Good luck!