From: Cornwall, UK
It's not so much the price of a game but how long I will or would play it.
That's true for everybody, I think. But, just as WitP, I don't think anyone can seriously doubt that WitE will provide thousands of hours of play for some, just as WitP did/does. That isn't true of everybody, though.. and I don't expect it to be true of me either, but I do expect to get much more playtime from WitE than I would get from any five 'mainstream' full price titles. But it's common sense not to buy a game you don't think you will play much, unless the price is so cheap it's a throwaway to find out whether you like it or not. I buy a lot of indies like that, usually in Steam sales, and maybe play one in four for more than an hour or two, but some of those give me far more entertainment than most full-price titles.
Usually you just don't know, even with demos, videos, AARs or whatever until you have bought and invested some time in the game - or decided even that investment isn't worth it. In this case, though, I think just about everybody seriously interested in the game was convinced they would get their monies worth and either hit the trigger on release day, is waiting for Christmas, or is saving up the money. There's still always a chance of buying a total lemon even when you least expect it ('Elemental' springs to mind), that's life, but fortunately that is NOT the case here.