I've had the IR-X since literally the day it came out and have used it on and off. I really like the functionality of the unit, but there are a couple drawbacks. First is the boost section which I find kind of useless as it's really difficult to tweak. Second is the effects loop which is purely mono, which makes it a lot less useful as a headphone device.
The Tone King pedals are a little different platform that has more IO including stereo effects loop, which seems far more useful for headphones. Also having stereo reverb onboard should give a much nicer headphone experience standalone. And there's no tiny knobs on the side to mess with.
So I'm very intrigued by the pedal, but honestly I wasn't blown away by the tones I heard. Not sure if the gain would get modern enough for my tastes, and I'd rather see an Imperial clean channel. But I like the WYSIWYG design.
On the Midi CC messages, yeah they were missing from the IR-X and I had to reference back to a Facebook post to find them. Very weird. Worked great but it's weird.