Did it in December, really good experience.
1A/K - they're not visible to each other, so not great for couples. Great for private solo travel.
For couples my order of preference would then be to go for the middle: 2E/F, 3E/F, 4E/F in that order (from front to galley).
If you're sat in a window (A/K) and middle (E/F) as a couple then you won't really feel like you're travelling together - so as a solo traveller in a window seat the middle passenger won't be encroaching on your space at all.
Enjoy it!