With the flash drives, are there less compatibility issues ? Do you the flash drives instead of discs ? I find that even with my own equipment, a flash drive always opens up. But sometimes with discs. they fail to open or are slower to view. A flash drive is much quicker. Does that have any bearing on your reason for using them ?
I'm looking at it as a way to make it easier for my clients to view their images instead of inserting the disc, waiting for it to open, speed depending on their PC.