A must for any GC owner, no question
The music is just right to set the tone, enemies can be heard communicating amongst themselves and threatening you, and sound effects are very realistic, especially the chainsaw.
The controls and camera are just right for a survival/horror and really make you feel like you're Leon at times.
Even once you've beat this game, there are plenty of new weapons to play with and two extra modes to beat. RE4 has great replay value, you can't just beat it once.