I had a full-sized wired aluminum Mac keyboard for years. I used it with the MacBook and later with the iMac.

After the 2015 break-in, the police came and did that thing that reassures homeowners but that rarely yields usable results: dusting for fingerprints.

That left me with a Mac keyboard that not only had a few letters (notably the "N" key) wearing off, but that sported coal-dust looking smudges over half the surface.

I got a Bluetooth Magic Keyboard with the new iMac after the burglary. It was OK but I never really got comfy with it. Its connection to the Mac would drop suddenly, or it would have trouble connecting on startup. I also thought the smaller size made typing feel cramped.

So I continued using the smudged, fading full-size keyboard. Which, because it was wired, took up one of the USB slots on the back of my new iMac.

For whatever reason, change is in the air. I heard Merlin Mann talk -- was it on Mac Power Users? -- about using a Bluetooth keyboard that with the touch of a button let him type on his MacBook, his iPad, or his iPhone. I finally tired of seeing this smudgy, fading keyboard. And I realized that I really envied the backlit keyboards; I tend to like having reduced light in my office in the evenings, and a backlit keyboard would make night-time writing and keying much more comfortable.

I went with the Wirecutter's recommendation of the Logitech K811 and it has so far proved an excellent purchase. I had thought about getting a Matias aluminum keyboard with backlighting, but decided to go with the cheaper option first; if I didn't like it, then I could justify spending more money for a demonstrably better keyboard.

Some notes on the K811:

• It has a built-in rechargeable battery. I can charge it using the same micro-USB plug I use for several of my other devices. But it does not show percentage of remaining battery from the Bluetooth menu bar icon.
• The backlit keyboard is wonderful. Just moving my hands in place over the keyboard will activate the backlight without my touching a key. I have the brightness set at just the right level to show the letters but not distract.
• It can pair with three devices. It's very simple to do this. I am running a Time Machine backup on my Mac and typing this on my iPad. With the press of a key, I can switch between the two computers. I'm leaving the third key unassigned for now.
• I had to download software from the K811 support site to allow me to use some of the function keys (such as Mission Control) as the Mac Gods intended.
• I had used the Magic Keyboard to write my blog posts on my iPad when we traveled recently. It worked fine, and I was planning to get a travel case for it. Now...I'm not so sure. The K811 has the same approximate dimensions, is lighter, and it's backlit. This may become my travel keyboard.
• The feel of the K811 is plasticky. It does not have the satisfying mass and density of the full-size keyboard it's replacing. It feels durable enough.
• I don't like that the K811 lies flatter on the desk, with less tilt, than the Magic Keyboard. If I find this tiring during longer writing stints, I can glue some rubber feet to the bottom of the K811. 
• The K811 has the chiclet keys that look and feel noticeably smaller than the Magic Keyboard's keys. That said, I can type just as fast on them and the keys' travel feels just right to me. 

I will keep the Magic Keyboard as a backup keyboard in case the K811 goes south for some reason. But for daily use on the iMac and occasional use on the iPad, the K811 has proven its worth.