I'm still using NXT 1.0 paste and it's one of the best looking waxes out there. My experience is similar to Paul's, and I get easy 3 months durability.
However, the paste produces more consistent results, is not prone to smearing as sometimes the liquid. First thing is to shake the hell out of it to ensure proper mixing and an even emulsion. Smearing is usually caused by the overdeposition of higher viscosity active ingredients, because the film forming ingredients cannot spread and/or level well. This may result in a patchy, slightly oily look, which is especially noticeable on dark colors. There was a particular old batch which was smeary, but Meguiar's usually replaced them at no extra cost.
It is important with NXT that you use very little, spread well and remove it from a panel to see how it's performing. When there are no unpleasant surprises, no smearing, oilyness, just a bright nice finish, you can leave on the remaining wax for about an hour. (Rewax the original area...) It will come off very easily, will hide fine imperfections surprisingly well, and it willl deepen the color.
So my advice it to keep it, try it. And yes, I'll buy the 2.0 paste as well.