Some additional features include: Can functions as a USB audio interface, built-in AUX input for jamming along with external music devices (MP3/CD players, etc.), runs on six AA batteries or AC adaptor, Cakewalk SONAR 8.5 LE software included, Free downloadable Librarian software.
I have a Boss ME-50 that I use for traveling or fly-gigs and it does a nice job of giving me everything I need in a small easy to use package. I would think that the new ME-25 should be as good if not better than the old ME-50 model. More toys (tools) to check out..!!!