It's very fun, but also very hard and scary the first time through. Basically, the game is punishing. You get overconfident, mash attack, rush in, don't block or do other foolish things you will die and have to redo the entire stage all over again.
That being said, the gameplay is amazing. The aformentioned punishing mechanic forces you to play very solid and carefully like a real soldier up against overwhelming odds. It forces you to think before you strike, calculating every blow. The combat is perfect, offering a real medival way of fighting.
Admosphere is genius, as is the art design.
So yeah, you'll enjoy it. But only if you have the patience. You will die, and will probably die alot. Learn from your mistakes instead of trying the same thing again and again untill it works, because that doesn't work here.
Also. DONT USE A GUIDE. It's the easy way out and ruins the game. Knowledge is power here, so if you already know everything, the admosphere is gone and every enemy becomes a pushover.