I use, Kaspersky Internet Securtity (3 PC - license) for several years and can not really complain. If you change not wild any defaults without knowing what you actually adjusted because the program runs smoothly. Only in the default browser, it hangs without changing the default settings, before slightly deeper clean. This is one of many sites that are executed pointed out that the call is a security risk. Then you have to make yourself a few things, because if one wants to call the page. This can be annoying sometimes when you sometimes just want to quickly do some research. That's why there are 1 star deduction. Nevertheless, I can not understand all the negative reviews.
What I find very beneficial is that you (Online Banking & Co) can open a secure browser for sensitive sites. About the "Safe payments" can deposit the relevant pages. Also Kaspersky is usually always on the top of the AV programs, first discover the new malicious code. At least if you believe the entries in various Prüfseiten.
All in all, I will engage again next year to Kaspersky AV and would highly recommend this program.