In the sex is fun podcast, the host has used device that sounds similar to what's being described. He gave it a positive review and reported stronger orgasms, not more ejaculate, but more forceful ejaculations.
Much like in the female orgasm, the PC muscle in men offers similar benefits, stronger sensations and more control. But in the long run, its a lot like driving a car and only knowing how to only use the accelerator...sooner or later you're going to crash without learning how to apply the brakes.
My advice... learn to drive first without the electrodes.