My MacBook Pro (15-inch, late 2016, with Touch Bar) is a very nice computer. The one thing that has somewhat bothered me is its keyboard with flat and closely spaced keys. I suspect it works well for hunt-and-peck typists. It is not a bad keyboard; it just is not the best for me for extensive typing. (I learned touch typing in school.) Typing on the computer’s keyboard has been slower and less accurate than I could type on my 2012 MacBook Pro. So, I have been looking for an external keyboard.
I have a very nice old Matias TactilePro keyboard. It works well with my new Mac when connected. Its qualities serve as a baseline for desired keyboard characteristics. However it is wired and requires a dongle to connect to the new computer. And, its weight and lack of bluetooth make it unsuitable for portable devices. A keyboard similar to it would be a good place to start.
Good keyboard sources are Matias as well as Logitech. Their websites provide keyboard models and specifications, while retail websites provide models carried and (sometimes) local stock. Websites and personal experience give me desired keyboard characteristics, such as keys working well that have locations easy to feel, bluetooth connectivity, numeric keypad, and backlit keys.
Ultimately, the best way to choose a keyboard is to type on it. I headed to local retailer Micro Center because they have a good selection of Matias and Logitech keyboards in stock and have helpful salespeople. I looked at, typed on, and felt several keyboards before I selected Matias Wireless Aluminum Keyboard with Backlight.
The keyboard types very well. It has the key combinations and special keys normal for a Mac keyboard. It connects easily with my Mac and stays connected. There have been no missed keypresses or delays in typing. My accuracy with it is very good. It has one button pairing with up to four devices. I really like the keyboard.