I don't know why the other reviewers had so much trouble-- IT WORKS FOR ME. Please keep in mind that this is a "For Dummies" review, because I have never used a file conversion program before (and I am not "tech savvy")... and I wish this program came with some basic instructions (for n00bs like me), but it wasn't hard to figure out how to make it work. Download and install the program, and then drag and drop the FOLDER containing the .ogm files you want to convert into the box. DO NOT TRY TO DRAG AND DROP INDIVIDUAL FILES BECAUSE IT WILL NOT DO ANYTHING-- I know, because I tried that and when nothing happened I thought the program was a dud. You have to drag over the whole folder with the files you want converted to get the program to recognize the files. As to how well the program works-- I tested three .ogm files that were between 250-300MB in size, without subtitles, and "OGM to AVI" converted them to .avi format in roughly 15 minutes. "OGM to AVI" also does not erase the .ogm file after it's done converting, so if there's a problem with the conversion you do not lose the original file. As far as I can tell, there has been NO LOSS of sound or visual quality in the files that I converted. I don't have any .ogm files with subtitles that need converting, so I don't know how well it would work for those-- but if I come across any, I will update my review to let you guys know how it goes. Cheers!