Just received my ME, with the FCS custom transformers and opamps. Always great service and communication with Roger, and so far the tone is very addictive.
I haven't yet had a chance to try it on acoustic or rock mixes, but it's doing a great job of bringing a more pleasant, deeper, and involving experience to some all-ITB electronic dance/pop music.
Experimenting with the controls, I can tell it's quite versatile and will take a while to get my head around. First impressions are rather accurately summed up with this actual photograph of my face here: