I have been testing this software for around a year now, I have not had any force positives, I have however been saved from installing virus infected software from Google store on at least half a dozen times. I have not seen any real discernable slow down in the speed of my phone. What could be useful as an additional functiin, is a link checker, an application which checks the site you are about to open, and if the site has a low reputation with regards to virus's and other malware, warns you, allowing you to either enter the site or allow you to go back to the previous Web page.