I bought three boxes last year and they're almost all gone now. I made a mistake with some at first and threw some away, but now I use them perfectly. At first, I just bought ones with rhinestones and stuff, but now I only buy solid colors. For some reason, I feel like the ones with rhinestones cause more damage. I'm going to Southeast Asia this time, and I'm debating whether to wear the Ohora rings or take them all off and get them done there. It's a love-hate relationship with Ohora. I'm about 70% satisfied, haha.
