The Pros
- Solar powered, obviating the need for continuous replacement or recharging of batteries
- Full length, with numeric keypad/arrow keys
- Light, thin and wireless
- Beautiful action
- Solar App to help manage charging levels
The Cons
- Uses a Logitech wireless dongle rather than Bluetooth
- Logitech Unifying Software doesn't work well on the Mac
- Internal battery is the devil's own job to replace
- Attempted built-in obsolescence
So when it died a couple of days ago I was really upset, especially as a new replacement is now twice the price of what it was when I bought it. Logitech no longer make the Mac version so it is becoming something of a rarity, and therefore commands high prices.

Removing the old battery involved prising the battery holder out of the case (inflicting a small amount of damage to the underside) using pliers, screwdrivers, and brute force. The battery itself had a sticker on it from Logitech explaining that the battery was not user replaceable (they would rather you purchase a new keyboard!) but I popped the new one in and crossed my fingers.
I ran the Unifying Software package to pair the keyboard (which had previously gone dark) and it appeared immediately. Although I couldn't get past the next stage of the set-up, I'd done enough for the iMac to see the keyboard and accept keystrokes.
We're back up and running!