I have played around with the NV (not the II) a bit and have to say it is pretty solid.
I think the screens are a nice gimmick, but they are not the end to using the laptop screen in my book. But I rarely stare 🙂
However it is a plastic controller, not that that is bad, just something to consider. It has upsides (weight) and downsides (takes less of a beating prolly).
It does have most functions you will ever need and the build quality is usually quite good with Numark.
So as far as mid-range Serato controllers go it is one of the top ones.