Hey dban, I don’t believe we’ve had the opportunity to meet here as yet, but I would highly recommend staying away from products like this. You could simply go on Amazon and purchase a multi-zone muscle stimulator for less than $50.00 that would probably do as good a job and give you the flexibility to use it on other sore muscles as well.
I’ve had the opportunity to trial a variety of stim devices of all kinds including 5 different surgical implants that always needed removal because they didn’t work, resulting in a total of 10 useless and unnecessary surgeries and a bunch of now painful scars.
If you really want to give something like this a try, I would recommend getting a multi-zone stim / tens unit and either schedule a visit with a Phys Therapist that knows how and where exactly to place the leads and how to get the best results for you. We’re all wired a bit different so it might take some experimentation to get the most benefit. I laud you for not giving up, please let us know how it’s working out! You might also check YouTube for some instructional video’s they’ve got so much stuff out there!
Best of luck, Tom!