In sum, it's an excellent keyboard for regular usage. It's portable and easy to store away. This is a serviceable replacement for the new Mac's flimsy keyboard if you must type while on the go. Except for some sticky function keys, I did not have any issues. You can use a program like Karabiner-Elements to simulate the Fn key. Includes advantages: The sensor may be damaged or it may not be eating enough despite the low price and quiet operation of the device. The downsides: The function keys sometimes work, sometimes they don't; at one point I got F4-F12 to work, but after the Use functional keys checkbox broke completely, and now you have to press Fn to get them to work again, the Fn key no longer works adequately on Mac (I did not check it on Win / Linux, they write that the problem is in the firmware); - The Fn key occasionally works; at one point I managed to get F4-F12 to work, but after that, it stopped Cons: - Keys get stuck while typing quickly; - Shift +, Shift + Space, which swallows up the space, is quite annoying; - Logitech help is unresponsive; - The Logi Options software is incompatible with Mac; -