After using my last save in a dumb spot, while playing through on Hardcore, I was forced to replay the ending hour of the campaign four times before I finally made it to and defeated the end boss. Adding up the times I had died at the end, I put around 10 hours into Hardcore. I was extremely happy, flipping off the credits screen, telling Dead Space 2 to go fuck itself for the hell it had just put me through.
However, after trying out the weapon that is unlocked after beating the game on Hardcore, I'm starting to think it's worth it.
NOTE: You can not use a Hardcore New Game + save for another Hardcore playthrough. I'm not sure why you would ever think of doing that to yourself, and I didn't expect the game to let me, but I figured it was worth pointing out.
Enjoy. Video is available in HD.