Just a note for potential buyers: I'm returning mine
It escapes me why they would make this machine with all these bells and whistles and not provide one simple, necessary feature: allow the user to hold down the extraction button to customize their extraction time for a double/single etc.
I called Ninja and they confirmed there is absolutely no way to change the extraction time from the built in system other than changing strength, which does not change dramatically at all.
I would rather have a $100 machine that allows me to customize the extraction strength.
Anyways, I thought I'd share. Ninja support was quite good, and i quite like their products in general. But this is a very stupid oversight on their part.