I love the onboard sequencer on the XPs to record little 1-8 measure hooks/melodies, basslines, multitrack grooves, beats, etc. It is especially handy when I am on the road, as I am quite often. But, when I want to actually use the sequences as part of a song or build a song from them, I save the sequence as an SMF-1 and load it into my software sequencer (Logic). Moving things around and editing in general is quite a bit easier in Logic than in the XP's sequencer. You should be able to learn basic sequencing on the XP's sequencer in one "session"; it's a breeze.