The muscle stimulator is not, as first thought wrongly, one of those "you get by stimulating a 6Pack without what for to make" - products but aims to lindern- pain and tension in the body and works as opposed to the other product really! The included manual should of course read through carefully before first use, even if the application is fairly simple in practice. You have to try all programs and strengths times through to decide for themselves to what a best helped. After 15 minutes, you feel then actually relaxed and pain-free, but this effect did never longer than half a day with me. After a busy day to relax this device is thus quite suitable, proper massage, however, can not permanently replace to release all tensions.