I've seen so many commercial and devices that say that you can just see around and relax, kick it back and watch TV and play on the PC while the electronic device attached to your ab muscles will give you rock solid abs or you can develop your chest biceps , triceps or any muscle group with it. I personally didn't believe in those lines, but to see for myself I bought two electronics devices and concetrated on the abs , i used the extensively and I saw no results. When I did the old-fashioned way, worked out in the gym I got good abs in a short period of time. So I'm pretty much conviced that the electronic devices are no good. However, I might've used them incorectlly. Is there anyone that saw any good of these devices. Any PROS/CONS of them , because I've heard that the electric waves that they use can be harmful for the body. Any device of this kind that was actually found effective ? . Thanks a lot .