well they r gonna get smarter as time goes by but its still a safe OS IMO and i havent installed any AV on my device though have the latest OS (lollipop) installed.
As far as I understand the app requires root so if your capable enough to root your device you should know a thing or two about the risks your taking. Low risk IMO
Here is a little more info: http://thehackernews.com/2015/02/po...ackersNews (The Hackers News - Security Blog)
I use the free Q.360 anti-malware on my Android. Is that just a scanner? If so, are their any recommended real=time protection apps available for Android.