What is the feature of bullet antivirus?

Hello friends,
What is the feature of bullet antivirus? I am using avast antivirus in my windows 7 operating system computer. I have no problem with this antivirus but still open of trying other security protection software. Share with me your experience using bullet antivirus and give me some advice if it is good for me to switch.
Thanks and Regards,
Kathryn Masud.
