It's nagware, it's spying on users, it leaves things even after used uninstall tool, etc. These are what I generally heard about this product. But despite that, it's an excellent antivirus product. It has strong behaviour monitor(thanks to AVG) and very good signature detection. I'm currently using it in hardened settings. I also blocked AvastUI from accessing to internet and blocked overseer completely from running. It's much lighter than Kaspersky, Kaspersky was casuing a massive disk usage every time I boot my computer(HDD).