This is overall a great port. They've added all the bells and whistles you could want on PC (fov slider for one) with a game like this as well as eliminated many of the issues with the N64 version (low frame rate, fog, can aim vertically while moving). My biggest issue is the audio. Overall it's great but some sounds are missing. When respawning, about half the animation is completely silent. A few sounds are also missing after killing the Primagen. Also, this game is in dire need of subtitles. I had to turn the music slider way down just so the dialog wasn't completely drowned out.
Hollow Knight is an excellent game which combines Metroidvania style gameplay with a story delivered in the style of Dark Souls. You have the freedom to explore anywhere your current abilities allow and the game lets you find your own way through the world. It is only brought down by occasional stuttering, which often leaves you taking damage and another bug. A bug (that is supposedly fixed now) prevented me from getting my final charm slot and weapon upgrade.