FYI: I have FMS/CFS/LYME and my husband has painfully sore muscles from doing hard physical work for the last forty years. We did not have the positive experience some here have had.
My husband and I rented the most expensive Alpha-Stim with the payments going toward purchase. We both used it at least once daily for over two months with no results. I called for support help several times to make sure we were using it right and we were.
Unless you can sit around holding the stim wands on your body in various contorted positions you will need to use the electrode patches. We have to get things done and could not just sit and do nothing for long periods, so we used wands only a few times weekly. The cost of replacing electrode patches all the time is quite a bit, esp. for hairy people like my hubby, and that is a permanently repeating cost the owner must bear. One patch only lasts for 3 uses max.
We sent it back, but we had already lost a lot of money.