I did an experiment with CloneDVd2. I opened it as usual to make a backup copy of one of my DVDs. I WANT to preserve the quality of the DVD so I am going to split it using 2 DVDs. I set the target size to DVD-5 and click the scissors and remove chapters until the quality bar reaches 100%. I only choose English audio and subtitles and director's comments. I use the DVD files option and save to the hard drive. The size of the VIDEO_TS folder is 4.36 GB ( max for a DVD ). Now the curious part. I do everything the same except now instead of using the target size of DVD-5, I make a custom setting of 9900 MB. I am removing the same chapters as before as if I were saving to a DVD. When I check the size of the folder, it is larger than 4.36 GB. I've tried a few movies and the sizes ranged from 4.41 GB to 4.76 GB. This means that CloneDVD2 is transcoding these movies to fit a DVD ( 4.36 GB ) and therefore the 100% that the quality bar states in inaccurate. ~0.43 GB more than 4.36 GB is about a 10% loss in quality. I know some might think that this is small loss and I am being picky. To fix this, I am removing 1 or even 2 chapters below what CloneDVD2 claims is 100% on the quality bar to disable the transcoder. Anyone have any comments? Basically, why does CloneDVD2 claim 100% quality retention when it isn't and is this amount of compression noticeable?