I have heard nothing about this program until today..I accidentally downloaded a ratDVD format and was bascially forced into downloading the ratDVD software. I am running Win7 x64 on core 2 duo 2.5 ghz 4 gb ram 1 gb vid memory. Upon installation, had to use Compatibility settings for Windows XP SP2. (Recommended by system), otherwise it couldn't access or open/install some .DLL files. After install I launched it, launched fine. Tried to open ratDVD file and waited for 10 mins. RatDVD locked up. Repeated this process with various settings and always the same outcome. I would stay away from this, seems very buggy and I wonder what was done to my system upon installation (spyware, etc.). Seems like an "iffy" program at best. Stick to ISO or CUE or IMG. Dont need a RAT to be added to the pack!!! lol