As always - Apple products are nothing less than Awesome. I normally wear these out after about 3 years or so. They can get damaged. My last Apple Keyboard got sat on and one key broke. Replaced it with this one and love it. No more batteries to change, just plug in once a month to charge. They also changed the layout a little. the ip/down/left right keys are much different. The escape key is larger., the upper rim where the battery was is gone. This is the only thing I did not like. It makes picking the keyboard up much harder, If you only leave it on a desk, there is no issue. I set it on my lap while sitting on a couch using the Mac.
Either way - Great value - works well
Jan 2018 Update: I have now has this 6 months - charged the keyboard 2 times since I got it. The first time I charged it, I lost the connection with Mac, a little frustrating - then learned to simply turn the switch on the keyboard off first - then charge. Works perfect now! Love the keyboard, a major improvement over other versions.