Ian, I have to agree with Trax - it sounds like bone dry MIDI to me.
I suggest you go for all RTs or a mix of RTs and real instruments. The mix is also a bit narrow in the width and the instruments don't seem to be totally 'in the same room' for me. Good start though!
One last thing, I would bring the tempo up about 20bpm. But then that's me - I prefer my blues a bit more rocky.
Well done and thanks for sharing
