I bought this as my first mechanical keyboard and I'm very satisfied so far. The keyboard itself feels very solid, the MX Brown switches are tactile and comfortable without being too noisy and the flexibility of wireless via Bluetooth with the option to plug in the USB cable as a fallback is great.
I also bought the corresponding blank keycaps (FKCS105BB) to give the keyboard a sleek, minimalist look.
There were a couple of small improvements that Filco could look at for a new version:
1. Include a USB wireless receiver (like the Logitech Unifying receiver) as an alternative to Bluetooth, so you don't have to plug in the USB cable to use your keyboard before your OS has booted up and started the Bluetooth.
2. Option to have the Numlock and Capslock lights work in Bluetooth mode (they are disabled, presumably to avoid clashing as the lights are used to indicate Bluetooth connectionpairing).
However, these are really minor things and overall I have found this keyboard to be excellent.
Finally, the customer service from The Keyboard Company was great - there was initially an issue with my order but on raising it they were extremely fast to respond and it was fully resolved very promptly. I will certainly be looking here first the next time I need a keyboard.