great review, avg is definitely very good despite all hateful comment about it
and as a AVG IS 2015 user myself, i'd say to everyone, never underestimate its capabilities
For me its not the capability, but the stability... AVG is rough... and seems to gotten better but still needs work.
I do like the whole setup it has, easy to configure, and likeable UI, scanner, protection etc. Where I get dissapointment is the boot up time is the SLOWEST of all AV I tried (10 more seconds) from the 2nd slowest, Panda. Now Panda was kinda pokey but AVG was its own OS!
AVG has highest RAM usage (free version) along with Forticlient but... AVG really should be lighter without its firewall on. It doesn't slow system, but at the expense of the memory use.
Now my two favorite free ones,
Comodo and Avast have the fastest boot times I have tried. Avast being even lighter overall as Comodo uses less memory but more system resources, Avast balances it perfectly.
I cannot say for Qihoo because I never tried it soooo... but I hear its the lightest on system, or so the AV test page says.