I'm in the beta but haven't tried it yet. The limitation of 2 sizes surprises me why so few? The amount of apps/actions on the size seems also really limited or can you set also 4-6 apps where you currently have only 3? I'm still using the classic NC widget since it feels I have it quicker at hand.
He may add another size later. You can make more than one of same size, and switch on homescreen. Not as good as the iOS stack, but works.