Right, there are no 100% guarantees you'll like what you buy even if everyone else does. But I would only have a very small percentage of content that I do now if I had to rent everything first, not speaking of 3D specifically as I only have around 45 titles that I'd bought, but of all my entertainment content. Most of the time I already know the ones I'm going to buy before hand because I've already made up my mind on them, like recently: The Hobbit, which I hadn't seen the 2nd one in theater. I bought it blind and it was a safe buy because it's a big budget film that everyone buys. But there aren't too many like that.
Speaking of 3D content I most certainly read the reviews first. There is some content out there I don't want to waste my time and money with even on a rental if the reviews come back negative. When you read the reviews and all them are coming back negative, then I'm going with the review. If half the reviews are negative and half positive I might take a chance on it, but I at least check the reviews first and see what the complaints about the title were and what were the positives. Then I'll make a decision if I still want to own it.
Right now it's really bad because you have these guys out there pushing their crap content because it's 3D, which you never would have bought before if it were 2D. Next, it's 4k, and they're going to do the same thing. Well, actually right now you have filmed in 4k but it's rendered to regular HD. It's getting really hard to tell the quality of content out there when all you have is a nice looking cover to go by. The reviews on products is probably the most important tool consumers have for buyer protection aside from purchasing from well-known publishers and reputation.
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