I am engineer with 18 years programming and testing custom applications for private companies. Solid background in .NET, Java, C++ and old software like Cobol and Clipper for DOS. Also I have my own lab at home with different platforms as XP, Vista, Windows 7, Linux and Unix SCO. Also, to be honest, real testing can not be performed in 3 days, you have to consider several factors and environments, that way I recommend at least 5 days to get a professional testing.