I'm coming up on the end of my first week with a new TREG unit. I'm still at the bottom of the learning curve as I acclimate to the feel and key spacing. Overall, I'm very pleased and excited to be part of the TREG. I haven't had a conversation with Mark yet, but I'm very much looking forward to it.
My most common mis-key by far is B instead of V. I'm also finding that I sometimes feel like I've pressed the space blade without it registering the keypress as a space.
And before I forget: QWERTY, US, and iOS / MacOS.
I also plan to use TBdf with Windows 10 sporadically in the future, but my daily drivers are MacBook Air, iPad (Air 2), and iPhone (6s). I was sent a dongle, and though I haven't yet paired with my older iMac, that's on my list of to-do's for this weekend or next.
One challenge I've had is that until I am fluent (and especially until I'm used to the special characters), I feel pressure to stick with my current set up for the sake of immediate productivity needs. So like h2guy, I find myself switching back and forth from the TB, which I prefer, and my less awesome but still respectable MacBook Air keyboard. I read the @waytools comment about this making acclimation take longer, and I take that advice to heart.
I'll report back once I feel like I've truly crossed that fluency threshold. For me, the litmus test will probably be when I can confidently sit in a meeting room with others, capturing notes with everyone able to see my output in real time.
I ran into some slight confusion when trying to pair with all my devices at once. It was not a TB issue as far as I can tell. Rather, I went into the process haphazardly and had to figure out the approach that would get me where I was trying to go with pairings. What worked for me was turning on BT for one device at a time, getting that device connected, then turning BT off and moving on to the next. I don't think for a moment that this was necessary, but it helped tame the confusion. The other thing that helped was WayTools' helpful affirmation in a support note that pairing labels are in the form: [slot number] - [#of pairing attempts].
Last of all, I want to mention that once the TREG process began for me, from the first call onward, I have had nothing but positive impressions of the WayTools team and their processes.