I love it! Perfectly remastered.
I've played through the other "big three" Build engine games (Duke Nukem 3D, Blood, and Shadow Warrior) and this one easily sits among them. If you love the boomer shooters of the 90s, you absolutely owe it to yourself to pick this one up. There's more than enough content to justify buying at full price (a meager $25). You'll be spending days tracking down every well-hidden secret and easter egg. My one complaint is that the GOG edition has no achievements, whereas the Steam version does. I hope the devs implement this soon for us GOG customers.