For the moment, I feel quite satisfied with my old v2.2 rulebook and the other stuff of the classical Twilight that I've managed to get (and, for the most part, I've still not used it) . The compatibility of v2.2 with Traveller: The New Era is an important feature, for me, and I consider the rules (with limited use of house-rules) are good enough. Perhaps I would buy it following the hunter/collector instinct that every GM has inside. But, without knowing the final product, a new timeline (I've read excellent and various timelines in this same forum) and a new set of rules to learn (and to communicate to my players) don't motivate me to make the expense. Of course, the hunter/collector instinct can make me change my opinion tomorrow...