I bought the PRIMA guide just because I thought it looked like an attractive book and a bit of memorabilia. For $20, what's the difference? I already dropped $150 on the TE, so might as well blow the whole wad.
I haven't bought a strategy guide in years, probably over 10 years. FAQs on the internet are much better.
Have guides gotten better? I remember back in the day, guides were terrible. They would often contain at least a couple of mistakes with incorrect information or moves and wouldn't cover every last thing. Also, with a game like MK I think it will be extra useless because clearly the DLC will not be covered.
Oh well, I just bought it because I thought it looked cool. I'm not counting on it to actually help me play the game.