I watched all the hellraiser films last year (2015) on halloween on encore. 1-3 are perhaps my favorite ones. If I remember part 4 was pretty good about how the puzzle box was made and came into existence. The only other one I enjoyed or liked was the one with the guy who was married to Christy and cheated on her. I loved the ending with her making a final deal with pinhead.
After that one the rest sucked, they should have just let them end the series with that one. All-in-all actually getting to watch them all was a first and actually was interesting to say the least.

Anyone who puts Hellraiser 3 over Inferno deserves a swift kick in the balls. H3 is straight up trash

1-4 are watchable with I-III being Classics of Rubber gore FX and atmosphere and are the most Clive Barker flavored, and 4 in Space was not bad. It had some cool Special FX too, but the rest after IV are dreck. I need to rewatch Inferno. Not watched it in years
They come from the bowels of hell. A transformed race of walking dead. Zombies guided by a master plan for complete domination

I thought Inferno was the best of the series, to be honest; atmospheric and moody, went back to the roots of the first while adding its own unique touches, and the "Jacob's Ladder" vibe was especially great.
The Saw Is Family