OK, well thanks to this thread I did get to try this.
My wife tied me up, blindfolded me, and used the wand on my penis whilst touching my nipples. It took 7 mins to make me cum, which I thought was fairly impressive. (Didn't realise she was timing it though. What a sneak.)
Another time, I used the wand on myself while she watched. That took slighlty longer but still very nice.
We've also been using the wand as an actual massager for back and shoulders, which is ostensibly what it was designed for. Very good tool to relieve stress! :)