While the Apple Wireless Keyboard is a great option for consumers owning Macs there are other alternatives out there you can get for as a keyboard. One of them I can recommend is the Logitech K750 Solar Keyboard for Mac as a great alternative to the standard Apple Wireless Keyboard.
The keyboard supports charging via solar power. It’s a renewable energy source that is abundant and is a great way to keep something like this low powered keyboard charged. Shown below is a screenshot of the supplemental app that you can get from Logitech which shows the charging status and the battery status.
One of the big caveats that people have with using Apple Wireless Keyboard is the lack of a Numberpad which may come handy in some situations. It provides great balance between the Apple Wired Keyboard with the Numberpad and the Apple Wireless Keyboard. Read more on progamerreview.com about what makes a really good keyboard, theres way more to it than you might think.
Unlike other keyboards the Mac version is almost identical to the original purchasable Mac keyboards where you have the standard cmd, alt/option, and control. There are also the standard F keys customized with Brightness, Media Keys, Mission Control, and Launchpad.
Logitech Unifying Receiver:
This can be feature and a con at same time depending on the person. For people that are already using Logitech’s hardware it provides an option to combine all of the Wireless products to interface with one adapter. For the people that are only using this product it could be a burden since it is another USB port taken.
Being a comparable price to the Apple Keyboards it provides a solid option if you are looking for a more feature rich version of the Apple Keyboard with the similar look and feel.