Don't play it higher than Lightly broiled, for your own sanity. But yes, it's phenomenal.
Brutal as Hell though. Be ready to quicksave and be ready to die frequently. But the level design, weapons, and enemies (for the most part) are top notch. The movement is actually pretty fun too, but nothing special. I prefer it to Duke Nukem 3D and Shadow Warrior, personally.
NBlood and Build GDX are recommended when playing. Fresh Supply is fine but kinda finicky. (To be fair, all of them a lil bit finicky, since Blood never had its source code released)