I've never had any vibrator do anything more than a slight tingle and definitely not to the point of orgasm without manual stimulation. Had a wand in the past, gave it to a girlfriend as she got more out of it than I did. Saw this on sale and got it along with another wand. The orgasms are mind blowing, roll your eyes in the back of your head, shaking. Yes, as others have said, if you're well endowed, you might not get the full effect, but if you cycle through the vibration settings and adjust where in the sleeve you put your cock, the different sensations should put you over the edge, even if it's only the tip. Well worth the investment.