Summary: My commercial gym doesn't allow chalk, but this is a great way to get your hands chalked to improve your grip. I just keep the ball in my gym bag, chalk up the hands and it gets the job done. I have also taken the ball to the lifting rack and no one notices since there's no mess.
Summary: I heard about this product from a weightlifting forum that I frequent and decided to give it a shot. It is marketed as a "non-marking chalk substitute." That is, it does the same thing without leaving a bunch of white dust everywhere.
Summary: I didn't order this for rock climbing. I ordered it to take to my gym and what I got was a pink one! Not a huge deal but i would have preferred one like the one in the picture. It does provide you with a great grip and it doesn't leave as much of a mess as regular chalk but it is not completely mess...
Summary: Use this in my home gym and it works perfect for that extra grip. I usually only use it on PR lifts to build up hand strength during warm up lifts. Also, wife approves and likes that there isn't chalk to mess with getting all over everything.
Summary: I feel like the quality of the chalk substitute is great. It really helped me on weight lifting. Unfortunately the bag broke my first time using it so I spilled the whole bag in my pocket. That is the only reason I don't like it. Especially since I bought it trying to be covert in my gym.
Summary: I am a traditional, barbell weight/powerlifter. There are a few specialty gyms in my area that cater to purist lifters like me, and where traditional chalk would be welcome. I don't have a membership at one of those gyms. They're too far away and inconvenient.