Yup! DH and I both do. Love 'em. We have only had to buy 2 in the past...what?...10 YEARS, and that is only because I dropped it on the floor and it broke! I have seen them in most drug stores. Even the unscented antiperspirants leave a "plastic" smell that I find noticable, so I don't like them. I will use them in the heat of the summer occasionally, though.
One thing I have noticed about the crystals, though, is that they leave a funky smell on ya if you try to "refresh" on a non-shower day. Just put on some MKK and leave it at that! LOL!