I had double space bar issues for 1.5 days (Unshaky counts double presses), then they disappeared. Then I randomly had small issues with E, 1, and something else... I or T perhaps? – but they also disappeared.
I might end up keeping this MBP, being prepared for keyboard problems, and once (not if, sigh) something happens and it goes to be repaired I'll buy a Macbook or the-new-Air-or-whatever-it's-called to keep me afloat from another of those resellers who allow returns for 30 days. No, I'm not happy that I need an app to catch double presses. Yes, I love everything else about this machine... I also looked at software I would need to buy again for Windows only to realise two of the programs I use most often don't even exist in Windows versions.
If they update the actual Air with a better screen and keep the keyboard as it is now (small chance) I'm getting one and returning the MBP, though.