My Issues with it
1. Too Expensive - Maybe this this can be attributed to most Apple products, but for a 12.9 version, the price is $349. That just seems crazy to me for what you get.
2. The viewing angle - I realize that they are dealing with physics and a heavy display means that you can't tilt it back very far without tipping. However, I am 6'5 and this just doesn't tilt back enough for my typical needs.
3. Lack of a way to fold the cover back - The Smart Keyboard for that initial 9.7 inch took into account that people don't want to remove the cover every time they want to use the iPad in tablet mode. It is much more convenient to fold it back when not using the manual keyboard. Of course, the old Smart Keyboard even has a way to stand it up with the Keyboard folded back and out of the way. I don't think any of their iPad keyboards have this feature anymore. As a result, if you take the iPad off the Magic Keyboard, you now have two things to deal with. I realize some will just keep the Keyboard parked on a desk, however, I don 't have a need to use the iPad that way. Also, now if I am laying on the couch reading and then decide I want to type something, I have to trackdown the keyboard. With the Smart Keyboard it was always attached.
4. Heavy - Way too heavy. With the Keyboard attached, the combo weighs about the same as a MBP 13 inch.
(unfortunately, the configuration below is not available)
What I like about it
Back lit Keys - Nice to have back lit keys.
The power port built in - this is nice even though the port only does power.
What I am considering
Ditch the Laptop?
That being said, if I was in the market right this minute for a new laptop, I think I would try to get by with the iPad and the Smart Keyboard Folio and just use the desktop for things that need that larger screen. I do understand why people would like to just get by with an iPad, but this keyboard just doesn't do that for me due to the many issues I mentioned above.
If Apple figures out a solution for the viewing angles and way to keep the keyboard attached in tablet mode (as an option), I would definitely be interested in it....of course, they would probably charge $500 for the "All New, Much, Much, More Magical, Magic Keyboard".