Denis....I just needed to get reacquainted with the Ketron OS again as I have owned and X1/XD9/MidJay & now the SD1+.....once you get the idea of how the hard drive is utilized you'll be fine its not like other KB's & can do so many things.....you can get alot of help here on the Yahoo Ketron Group also.....
http://launch.groups.yahoo.com/group/solton/messages?o=1


as far as the SMF playback I think its one of the best out there right next to Roland...the Juke Box feature makes it real easy to play SMF's & get the next song ready also ....I love the editing also.....easy to edit, change sounds, efx, vol, etc and re-save with the push of a button....the SD1+ is a super feature packed KB....its alot to take in in one shot....I would suggest taking time with each area, reading the manual, asking lots aof questions, & experiencing by playing & playing more.....

Is there something specific you need to learn?