Has anyone used antivirus named K7?

I got this antivirus on computer related magazine. I got only 30 day trail offer. I used that. I got satisfied with the performance of the k7 antivirus. It is faster and safer. Most of antivirus softwares slows down our computer and net speed. But this anti virus is not slowing down computer nor net speed. Unfortunately i havent got a dealer near by me so i have not bought that antivirus after my trail perios.