I have been using Kaspersky Internet Security for many years now and have been suggesting it to a lot of my friends and family members. The product provides live protection against phishing and virus attacks. A lot of people complain that their systems get slower after installing this (or other) internet security software. It hasn't happened to me yet. Unless your system is very old (more than 7-8 years) or it has pirated copy of OS, the chances of system getting slower because of internet security installation is very low. Keep your system updated and perform regular scans. As for the delivery of the product, Amazon services have been good. The only reason I'm not giving 5 stars is because sometimes, I have found the price to be slightly cheaper at Nehru Place. Besides, nothing is perfect, so no 5 stars. Kudos to Kaspersky and to Amazon for the product and the delivery.