My guide is on the normal settings, and yes, many of my plans will result in you taking a few hits - thankfully you can take a few. So maybe you need to plan extra hard if you go for more challenging fair.
The graphics and gun play are enough to make this a great game, though I could easily see not adding this to your collection; it is the same tactics and game play over and over, with very little variation. Still, something about the
fights make this a great game, and the tight spots are way cool. Worth the buy or rent (rent in my case).