We use playsand with our adult bearded dragons and adult collared lizards, and have never had a problem. We used to use calci-sand, and again we personally never experienced any problems - we even used it with babies at one point.
For our baby Bearded Dragons, collareds and geckos we currently use paper towels - we had repticarpet in with the geckos but they kept getting their claws caught and their teeth kept getting stuck on the carpet when they went to catch crickets, has anyone else experienced this? So, for now, we are keeping them on paper towels.
There are small risks with many substrates - you need to gather all the facts and listen to all the issues and opinions, and then make up your own mind as to what you want to use. There is no better experience than personal experience, and you need to see what works and what doesn't for you personally.
