I too, like many on here, have owned multiple formats of The Beatles over the years. From records to tape to the original 1987 CD's to 2009 Stereo/Mono Remastered CD's, there is no comparison to the FLAC 24 BIT files on this. The sound is so clear and crisp that you can hear everything! It is like listening to the tracks live from the studio. This was well worth the extra $230 I paid while stick in stock here at Amazon.
Also, wanted to pass on what I did to use the FLAC files. I downloaded MAX for my MAC, which is free, and configured it to output to AIFF 24 Bit files. From there I simply dragged them into iTunes to listen. This whole process was very simple to do. Now these AIFF 24 BIT files will NOT play on my iPod Classic (5G) but they do play on my iPhone 3GS and did come over as 24 BIT files.
If you are looking for The Beatles Remastered Set or even if you already have them, this USB with the FLAC files will not disappoint you!