I've just sold mine. I will try and explain it. Personally, I am quite the fan of the Marshall sound, and however long spent twiddling the knobs, it was only just as good as my 2203 at low volumes.
I wanted 1 sound, that had LOTS!
Also Dirty Fingers pickups seem quite picky with the patches, so if I did want some variety I had to change to another guitar. It says in the manual, something to the extent of 'each patch is voiced for the correct gutiar for the situation'. So for the Schenker patch, I should be playing a V with Patent numbers in; thats not going to happen.
It also takes a while to dial in, each knob has 256 little steps, which is hard to focus on the right area.
I am still interested in the character pedals though, which are still a preamp