Apart from using the BK-7m selection wheel (I think it contributed a little to my chronic tenosynovitis near the ellbow), I think it is an extremely practical and good sounding module (except acoustic guitars and certain strings).
Here's a new recording of BK-7m with MoXF: "Killing me softly". Only the strings (coming in later) are from the MoXF, everything else from the BK-7m. It is played with a style, no midi file. With the MoXF and BK-7m together, you have a great choice of sounds, and the MoXF6 is very lightweight.

http://youtu.be/_qoezMe_6wM