Players are advised to use CC at their own risk as EA does screen or support CC/mods directly but allows for players to have CC/mods if they want. I personally use CC in the Sims 3 with no issues. The Sims Resource is quite a reputable CC downloading site, so most downloads are safe but I would still advise having antivirus on your PC.
CC doesn't usually after the game, just adds new things, so even if an issue is created. By removing the CC from the mods file you will have the game back to usual, so it isn't going to be a long, tiresome process to fix IF in the rare, unlikely even, it causes an issue.
