The only time I use a regular keyboard is when I'm gaming, and that's only because I haven't bought a gaming pad yet. The TextBlade is the only keyboard I use for everything else, and it has been since I got it. One time, I forgot the TextBlade at home and didn't realize it until I was in the parking lot at work. I made a one-hour round trip to retrieve my TextBlade, rather than use the keyboard on my laptop or use another work-provided keyboard.
Prior to getting the TextBlade, I used a single bespoke keyboard that I carried every day between work and home because it was vastly superior to regular keyboards. The TextBlade is better in nearly every way to my custom keyboard. The only feature of my custom keyboard that I like more is that it puts more keys (delete, backspace, function layer, and space) under the thumbs. But it's also much larger than the TextBlade, only works on devices with USB A ports, and if I want to change the layout, I have to edit and compile drivers and flash the microcontroller. I've never used an ErgoDox, Kinesis Advantage, or Dactyl, but I don't like the layout of the thumb clusters on those boards and I'm fairly certain that, given the chance to use them, I would still prefer the TextBlade. The TextBlade is the only keyboard I plan on using for the foreseeable future. Its split orthogonal layout is superior to every row-staggered layout, in my opinion. The reduction in finger travel is massive, the keyfeel is great. The feature set, programmability, and functionality of the TextBlade may be unparalleled in the market. It is difficult to overstate how awesome the TextBlade is.
Now, time for the reality check. Prior to getting the TextBlade, I had been using a keyboard that had layers and layer switching similar to the TextBlade's navigation layer for years. I'm also a touch typist. It took me about ten minutes to become functional enough with the TextBlade that I could justifiably replace my keyboard without a significant drop in productivity. I know of one or two other TREG members who have had a similar adjustment period. I do not know how long it took any other TREG members to acclimate to the TextBlade, but I do know that many of them have had a TextBlade for at least a year, so, even if their adjustment period wasn't as quick, they've had a lot of time with the TextBlade.
I also put the TextBlade on a pedestal. Even two months after I got the TextBlade, I would find it difficult to believe that I finally had it. And I had moments of frustration, but they were not due to what the TextBlade does or does not do (it does everything). The frustration came from measuring my performance on a new layout against my performance on a layout that I'd spent years developing muscle memory on. But the frustration was always temporary because the TextBlade excels at so much. Four months after I'd gotten the TextBlade, my productivity was at least as high as it was on the keyboard I'd been using for years.
I can't say how long it will take you to reach parity on the the TextBlade, but the payout is worth the effort. You will have a consistent input interface regardless of which operating system you are working on. You won't have to take your hands off the home row to access features that require you to move your hands to opposite ends of traditional keyboards. You will be able to take this keyboard anywhere. You will be able to write emails, text messages, and documents on your phone at the same speed as you can on a computer. You will be able to customize your keyboard to put the characters where you want. You will have access to a staggering array of features including application, media, and browser controls; custom macros; and custom functions. And the TextBlade has magnets, so it's guaranteed to baffle the Insane Clown Posse. The TextBlade is the ultimate power user input device and it's accessiblae to casual users, too.
I know I sound like a shill. Every time I talk about the TextBlade, I place it on a higher pedestal. I know this is frustrating to the people who've endured years of missed shipping estimates and inconsistent communication schedules. If my tone is interpreted as gloating or condescending, I apologize. I really want the TextBlade to reach general release so everyone can judge it for themselves. Personally, I feel that the TextBlade might not only be the best commercially produced keyboard, it belongs on the list of best-designed products.