First, let me compare owning NCV versus exchanging in. Every year for the last ten plus years I have deposited a 1 BR Desert Springs (Palm Desert) and exchanged into a 2 BR at NCV in September. I love September but it is a bit of a challenge (although I've done it 10 years in a row). October seems much easier to get and I've routinely seen inventory sitting.
I'm actually kind of fussy on my exchanges. I never put a resort on my request that is mediocre or of lesser quality than what I deposited. But I always put in a fairly wide range of dates (not constrained by a school schedule) and typically do a shotgun approach. Both greatly increase my chances for a successful exchange. For instance, I may put Hyatt Pinon Point, Newport Coast, Marriott Northstar (Tahoe), Hyatt Northstar (Tahoe), Hyatt Carmel, Marriott Canyon Villas (Phoenix) all in the same request or split them among two requests. My theory: all are great properties and I'd be happy going to any of them. Also, when I exchange into Hawaii I also shotgun and request any Marriott, Sheraton, Hyatt, and some of the Westins over a couple of month interval.
I also frequently check for possible manual exchanges.
I often use my home resort efficiency units to trade back in to Marriott Palm Desert but into a bigger unit.
For me, I've had good success. But I invest the effort to reserve the highest TDI that I can and may request a somewhat lower TDI value. I quickly put in my shotgun requests, am realistic in choosing my vacation dates, plus manually check for something that may have shown up.
Newport Coast is a great property and I suspect is a good for trading (assuming you've deposited a fairly high TDI platinum unit). But the units don't split so you'd be depositing a 2 BR. Me? I bought 2 BR lock offs that I split. My mistake is I probably should have bought Red/Platinum season units. My White/gold units trade okay but, I think that it would be easier with a stronger season.
If you are planning on using NCV more than half the time, it might be a good purchase for you. I think that it trades very well. If you are buying it for trading, there are better choices out there.