The evad3rs iOS 7 jailbreak has had a bit of a rocky launch. First there were rumors that someone close to the group had stolen the exploit and sold it to a private buyer, then soon after its release the jailbreak community accused the evad3rs of becoming greedy by partnering with the Chinese App Store TaiG.
The evad3rs quickly responded to all the rumors with a message posted on their website. In a letter addressed to the "Jailbreak Community," the evad3rs have made it clear that users were "not locked into TaiG" and could still install Cydia. The evad3rs also added that they had never shared their exploits with TaiG's owners, and that preventing piracy is extremely important to them. This all lead to pod2g announcing on Twitter today, that the evad3rs had decided to "remotely disable the default installation of TaiG in China for further investigations on the piracy issue."
Even with all the hoopla surrounding the iOS 7 jailbreak, evasi0n 7 still seems safe to install. However, just like with all previous jailbreaks, users should use evasi0n 7 with caution and always back up their device before doing anything. You can learn how to jailbreak your iOS 7 device using Windows here and Mac OS X here.