I've been meaning for a few weeks to put in a good word for Kaspersky. After over a decade of totally unprotected (but careful) surfing, I finally picked up a nasty "ultimate defender" Trojan. I dealt with it and then decided to install AV, I chose Kaspersky for various reasons I won't go into.
What impressed me was that I subsequently decided that, with hindsight, I'd have preferred the three-user version so I could install it on my laptop too. There seemed to be no 'off the shelf' licence upgrade on their website, so I sent a groveling email to Kaspersky....
...They responded in less than an hour, and it was a proper response - not auto-generated - from a real (English speaking) person in a real English town. She set me up with specially created a link to a licence 'upgrade' which allowed gave me a new licence(s) for which I had to pay only £10 (the normal retail differential). Within two hours of sending that email, they'd generated the licences and I'd got them installed on my systems. Not bad, huh?
I don't know how good it is at its job, but I'm cynical about all AV software (that's why I ran without protection for so long). I'm so cynical, however, that I probably won't be disappointed.
So far it seems fine, quite unobtrusive, but reassuring to know it's there. Their firewall is OK I think, but awfully complicated to configure. I'm afraid their so-called 24-hour telephone support is just a joke, little more than a recorded message telling you to check this, that, and the other. But I assume that's par for the course.