Still loving mine. I am using it with their wireless MIDI dongle in order to skip a cable. Works great, very low latency. The only downside is that it doesn't support any sort of a grouping mode - meaning, you can't pair any other wireless MIDI devices simultaneously. This meant shelving my Roland EV-1-WL expression pedal, and connecting a mini pedal to the MIDI Captain with a short TRS cable.
In reference to some of the posts above (my own and
@Alex Kenivel's), the issue with expr. position jumping around comes down to polarity. You can "fix" the problem (or at least prove the cause) by breaking out the L and R signals and swapping them with an unsightly pile of dongles - or you can buy a pedal with switchable polarity. The Hotone pedal I had was the wrong polarity, and the Dunlop in similar form factor is a little overpriced, so I would up with Paint Audio's own equivalent. It has two outputs: one for each polarity. Nice feature.
I never bothered upgrading to the f/w that supports Geek Mode, because I know I would spend the rest of my life "optimizing" it. I played with a couple of variations and just landed on a setup that maps the left 8 switches to Quad Cortex switches A-H (like for like), maps the top right switch (up) to cycle between QC modes (Scene and Stomp, typically), and maps the bottom right (down) switch to toggle in and out of the QC looper view. Works great.
The rechargeable feature is a little weird. Slow as hell, and no idea what's happening if it isn't powered on. I've usually got a USB cable connected to a charger, so it's slowly charging whenever I'm using it. If I ever had to take it out of the studio, it would be ready. But arguably, leaving it plugged in by default kind of defeats the purpose.
@SillyOctopus - worth holding out for the gold version w/ wireless IMO. It actually looks more like brushed steel in person. Nothing too garish, apart from the rainbow-colored "MIDI" logo.