These are the important features for me:1. Everything is assignable/programmable to almost anything in the MIDI spec - control changes, patch (program) changes, and even polyphonic note triggers. 2. MIDI input MERGES with the MIDI Out - an important and handy feature. There is also a WX input which can be used instead of the MIDI in.3. There are 4 (Four!) cv inputs, so including the built-in cv pedal you can have FIVE cv pedals (or any cv controller). Other pedal boards have fewer controller inputs, and they are often just switch, not cv, inputs.4. Can have up to 100 different button pedals, in groups of ten (basically 10 banks of ten) in the mode I use.5. Control changes on the button pedals can be toggle (like an on/off switch) or normal triggers (like a sustain pedal).This thing is sturdy - I've been stomping on mine for more than five years now. It is the best of all the pedal boards that I've considered (the Behringer looks good, but I haven't tried it), but there are drawbacks. The three annoying drawbacks:1. Note triggers can't be set to toggle - this is a BIG drawback in my opinion, but there usually are work arounds on your other gear if you need to do this. Forget being able, at least easily, to turn on and off a looped sample from this board. Depending on your other gear there are work arounds. But it is fine for one-shot triggers.2. You can't combine note triggers with control changes on the same button. (So you can't work around problem #1 by having a sustain toggle on the same button as a note trigger. You can have them on adjacent buttons if you're good with your feet - because it CAN simultaneously send data from two pedals, but this is too inelegant for me.)3. Whenever I turn my controller keyboard on or off, the MFC10 gets an error and won't do anything. But this is a minor annoyance because a tap of the "exit" button brings it back to normal in less than two seconds. It's probably due to some incompatible settings that I've been too lazy to find.4. The supplied wall wart's cable is too short. I'd give 4.75 stars if possible because I love the unit, but the annoyances keep me from giving it a perfect 5. The MFC-10 is central to my primary performance system, which uses a Roland AX-1 or AX-7 running into this unit, with Yamaha FC7s cv pedals connected to the MFC10. I've used this system to control a variety of gear, but this past year I've primarily used a Motif module. In my setup, the fc7s control volume of different channels; the built-in cv pedal controls modulation on channel 1; the bottom row of buttons are usually a variety of sustain pedals (different channels, some with the toggle feature); the top row I use to trigger special effects sounds and to send patch changes in songs which have my hands too busy. In the past I've used the buttons as mute buttons, for panning effects, and to turn Leslie effects on and off for organ sounds. It can be used for almost anything. You can get creative with it!

This is the Midi foot controller I need to control my guitar preamp and effects processors.

This will control any midi instrument or amp or effects module or whatever. I even use it live with my keyboard to trigger different samples. It's programmable too so you can make it do lots of things. Very high on the "wow" scale. Worth twice what they are asking here.