Powerful, but not worth the batteries.
I bought this after my womanizer died and definitely preferred using this but it drained the batteries so fast and required expensive batteries to run. In the end it just wasn't worth the cost to run it.
A very different feeling but very nice.
The best thing o have brought of here I love it
My wife loves this, it's a slow build up but gets the job done and isn't as intense as a normal vibrator.