For the past 6 years, I have used nothing but mainstream brand full-size mechanical keyboards! I was sitting on the fence for weeks deciding on whether or not spending this amount of keyboard was justifiable.
In the end I decided to bite the bullet and make the purchase, I have never bought anything from The Keyboard Co before, however, now I have I can say I can wholeheartedly recommend them, quick, professional and with plenty of choice for even the most niche preferences.
The first time I used the keyboard, it felt like I had come to a revelation. The keyboard feels extremely solidly built, even for plastic casing. The keys feel far nicer and grippier than the ABS plastic ones on the consumer boards I used before. Even the tactile feel is much smoother and cleaner than that of equivalent MX Brown keyboards I had been using previously.
I was initially hesitant about switching from full size to TKL, but now I have gotten used to it, this form factor is far more comfortable to type on and use along-side my mouse as it sits more central on my desk.
I do use this keyboard with Linux, and there are a couple of steps you need to take due to some Linux distros recognising it as a Mac Keyboard, for things to work (i.e. function keys). Also used on my work PC that runs Windows 10 with no problem.
Overall, great keyboard and great company! Both highly recommended.