I am using Sony VMS, and I transfer just the .mts files to my computer using Windows and work on them from there. What is in the .cpi files that I might be missing? I gather that using ImageMixer to transfer the files combines the info in the .cpi files with the .mts files to create the .m2ts, but what does a.m2ts have that a .mts doesn't? And is there any reason to keep the .cpi files? Or any reason that using ImageMixer is 'better' than just copying the files? Or does ImageMixer just add another step to the workflow that doesn't add much value?