Reply to MIDI Fighter Users: How do you use your MIDI Fighters?

So I am believeing of getting a MIDI Fighter (or two). I have a Kontrol F1 for remix decks and was going to consider either another F1 or a MF3D for remix decks....possibly a MF Classic for FX. My main controller is an X1 with the F1 for remix decks. I may get an all-in-one and add a MF to the setup for some versatility, but then again, maybe not. My mixer is DN-X1700, so I don't NEED an all-in-one, just want one for easy portability and I figure a MIDI Fighter would complement either setup nicely...or I could forgo the all-in-one and get a couple of MIDI Fighters (I have limited budget...)

So, my question is, all you MIDI Fighter users, how do you use them? What is your setup? how many/what kind do you have? and what do you recommend?