Thanks for the feedback.
I have used a few different types of media such as Fuji, Maxwell, etc. Usually I try to get Fuji. I didn't bother to identify the actual manufacturer of these dvds though. I've always used -R media.
All I can say is that it seems that 80% of the movies I burn with dvdfab don't work in the end. There aren't any burning errors, but at some point in the movie the video will stutter/stop and then go back to the beginning.
If I use ImgBurn it seems that maybe 80% of the movies I burn work great.
I use the word "seems" because I haven't actually kept records of these observations.
How do people typically take control of the quality of the dvds that they buy? It's been my impression that it's always a gamble as to who the manufacturer of the dvd is, you won't know until you take your new bundle of dvds home and try one out. Once you've gong through the 50 that you buy, there's no guarantee that buying the same brand again will result in the same manufacturer...