I was with a woman on Sunday night who had a portable one (such a neat little machine). She loved it! I'll be getting one for my next labour. I tried it the other day on my arm, pins and needles would be my description too. I was quite amazed how strong it was.

She hired hers for about $80 with a $20 refund if the electrodes were unused. Its a tiny machine that hangs on a chain around her neck. Well worth it Id say. If you dont use it you dont use it.