I remember leaving home and going on a "healthy me" phase, I purchased a body crystal for around $15 at the time, it was a whole new concept to the normal roll on deodorant, with this one you have to wet the surface before rolling it under your arm pits, it does feel strange because its not as smooth and soothing as normal deodorants but it does work! I would compare it to a hard rock and rubbing it under your arms, it kept sweat at bay especially in Summer and it lasted a lot longer than the average roll on.
Also being a big fan of black, it never leaves any residue or marks on your clothing, back then it was so hard to find a deodorant that didn't leave any marks. It has the tiniest salty smell which doesn't overpower any perfumes that you wear.
This is a fantastic deodorant and goes above and beyond on what it says it would do. I realised I used less deodorant when I was using this because it did the job the first time and I didn't have to keep re-applying thru the day.
I have repurchased the unscented spray version of this. I like to use this before bed and also on feet. The pros of this is that it kills the bacteria and so although you will sweat it won't stink or at least not as much. This is good for bedtime when you aren't going to move around but don't want to wake up with stinky armpits. I do find that when I spray this on at night my deoderant works better the next day. The spray is also handy for feet if your feet get stinky and sweaty then spraying this on them and leaving them to dry for a few minutes helps to lessen the foot odour you get when your socks come off. I wouldn't recommend this in place of a anti-perspirant as you will be left down if you wear this to the gym or to work, but this is like a boost for your regular deoderant you can wear this underneath it overnight and the next day your deoderant is more effective. Sometimes I overheat I at night and I have to wash my armpits before applying my deoderant in the morning but this helps my deoderant be more effective most days. One bottle lasts me many months so definitely worth the price.
Tips: Spray on your armpits after your evening shower or bath to reduce the stink the next morning. Spray on your feet and let dry before putting on socks for less stinky feet.