I don’t know which ones you have tried or the ones that you found defective. I think this is a place where you can get a lot of suggestions which will help you decide the better one. I personally use
DVD ripping program that works very well with me. It isn’t a problem using it as it has a simple operating base and provides good quality and speed performance. It can rip DVDs straight to a variety of compressed video file formats such as AVI, WMV, DivX, Xvid, 3GP, MP4 and many more. This will not put you in the trouble of searching for any additional software with such variety of files.