I'm the type that doesn't mind being spoiled. If the story is good as it sounds, it will reflect through whatever media. I guess it's a difference in perspective, if I were to read both the LN and manga, my opinions about the story would change. I haven't watched the anime yet. I think it would still be fun seeing the pages come to animation.

I can understand the thrill of building up tension and catharsis after finally watching the show and staying away from the manga. I just think it's silly to prolong that agony when both results will just end you knowing how the story will flow anyway.