I am returning mine because:
1) the up and down arrows work half of the time unless I press really hard. They don't seem to 'register'. Other keys don't have this issue
2) the keys are LOUD. Every key seems to produce a different tone, bit of a tapping concert really. I would have issue with this thing in a quiet environment
3) the screen, speakers and speed of my iPad Pro 9.7 are (unfortunately) better. Who would have thought so as the iPad costs around £600. I was expecting this new nTMBP to trump my iPad Pro in every way.
4) Realised that most Apps are significantly better than their internet version (FB, instagram, twitter, LinkedIn, Skype, BBC News, and many many more). Websites are full of ads whereas Apps seem 'tidier'
So mine is going back today because of issue no 1). For me, the keyboard, is not a finished product and I cannot trust it to last for 5-6 years as it looks already dodgy out of the box. Why the keys feel different and produce a different sound? How can that be even possible? For comparison, my 2010 MBP has identical keys. All same sound, same travel, still works like a charm.
The new one? Almost every key is different.