is it a must?
it’s pros/cons?
should avast add it? :
???
This has been covered in a number of threads and currently Alwil say no outside of the email scanner.
..It may be that the traditional anti-virus scanner, based only on signature updates, will eventually disappear completely in favour of products that have strong heuristic engines, but anti-virus companies will still be required to provide signature-based detection for the foreseeable future. It seems most likely that heuristics-based scanners will be used more and more to protect the entry points, email, web, ftp, IRC, IM etc., to help prevent the initial infiltration and the traditional scanner will remain firmly in place as the last bastion of good desktop protection.Andrew Lee is CTO at Eset Software
http://www.scmagazine.com/uk/news/article/456412/why+anti-virus+products+employ+heuristic+detection/