I received my TB-12 a few hours ago and I want to give a quick "first impression".
First, I was in the middle of an arduino project to make a MIDI footboard that was easily programmable etc. Time constraints and massive "coding headaches" forced me to move in a different direction. I already had built 2 EXP pedals I just needed the footsboard. Not being able to afford the official remote (would if I could) I found a link to BJDevices in Russia and ordered the TB-12.
Shipping time from Russia to Virginia was 20 days order to doorstep. Much better than I expected.
First impression is this is a professionally built piece. All the specs are here. http://bjdevices.com/en/catalog/products/tb-12-detail
Second, I fired up the kemper and hooked up the TB-12 via 2 MIDI cables. Immediately the screen on the TB-12 flashed Kemper and I knew that was a good sign. I had browsed the manual over and over while waiting for it to arrive so it took me literally no more than 10 minutes to set up a simple config that turns stomps on and off and set up 4 switches for the looper. Easy as that.
I will give a more in depth review once I really dig into the TB-12 but this is the easy to configure MIDI pedal board that pretty much everyone is looking for. If you are looking for something that works and is fairly easy to configure, check these guys out. Props to Sergey and BJDevices.