Very effective, powerful, like the original wired version. Still solidly built and reliable as the original. Maybe too heavy for longer term use in some positions.
I bought this for my wife for valentines day, we'd seen it in the past but didn't want to deal with the power wire - this chargeable version has fixed that concern! The power from the wand puts all others to shame and often we've used it over clothes with even better results. The build quality is awesome, I wouldn't recommend alternative "copy cat" products. Stop hesitating, just do it for her sake!