This release gives you, at a bargain price, most of the Spector masterpieces that the average person would want. In the days of vinyl, I had the Christmas album and a "best of the rest" with a very similar listing to the second CD of this set. In the absence of such a collection on CD, a few years ago I bought the "Back to Mono" box set, which is more of a "definitive" collection, and priced accordingly. If this double set had been available then, I would have bought it instead.
Buy while it's still on the catalogue. Bargain Spector compilations like this don't appear very often. You can, of course, buy the Christmas album on its own at any time, for not much less (and sometimes a bit more) than the price of this set.