I like Avast, and have been using it for about 3 years. However, I do occasionally come upon bad reviews for the product. :-[ Such as this: http://www.pcworld.com/article/id,124488-page,1/article.html
This review is old and crappy. Plus they haven’t even mentioned this forum as mean of free tech support with top notch response times from avast! community or tech support team itself lurking around here.
As far as I know，avast! antivirus is the only one that supports the most languages in the interface. I recommended this product to users in a Hong Kong forum when avast! antivirus released it first Chinese version. Most of their reactions toward this product are very positive. They think that the skin function is amazing because they never thought they could change the skin of antivirus. The several modules built in avast! antivirus also make them feel much secure，especially WebShield and Network Shield. However，most of them also point out that avast! antivirus needs to optimize its memory usage and scanning performance. Many users in that Hong Kong forum have chosen avast! antivirus as a free antivirus solution now. Those who want a commercial solution have chosen Eset NOD32 or Kaspersky Anti-Virus because of the ongoing and aggressive advertising of these antivirus companies.
Indeed, more than 30 Languages:
Bulgarian
ChineseT
Czech
Danish
German
Greek
English
Spanish
Finnish
French
Hungarian
Italian
Japanese
Korean
Dutch
Norwegian
Polish
Portuguese (Brazil)
Romanian
Russian
Croatian
Slovak
Swedish
Turkish
Slovenian
Malay
ChineseS
Portugal
Serbian
Unique 8)
Few others have Themes (but not skins).
Configurability… the best of avast! 
They’re losing avast Pro and ADNM version 
Propaganda, i wondered who paid (or “bribe” to be more crude), the “review”
Maybe someone can try to post a rebuttal on the user review section of the article
Bulgarian ChineseT Czech Danish German Greek English Spanish Finnish French Hungarian Italian Japanese Korean Dutch Norwegian Polish Portuguese (Brazil) Romanian Russian Croatian Slovak Swedish Turkish Slovenian Malay ChineseS Portugal Serbian
And Macedonian is coming next 
That review was being made dated back in January 2006 and for avast! Home Edition 4.6