If you don't know you're dead, are you really dead?
Well, that's the question. I think you would be dead and the body that comes out the other end would just be some other person with your consciousness. Walking into that teleportation chamber would be the last thing you do. Your body and consciousness would still be there for everyone else, though. I certainly wouldn't be willing to try it. Best case scenario, you make it to the other side and still can't convince fence sitters like me that it's really you and not some copy just replacing your dead body. Worst case scenario, you never make it to the other side.
Edit: I don't really think the question is so much whether you will know if you are dead. Whatever comes out of the teleporter will be alive. You just won't know if you are still you. I think people are confusing thoughts and memories as existence. Just because a regenerated body shares your thoughts and memories, that doesn't mean that it is you and that you successfully survived a teleportation. There are plenty of living people today who have lost their thoughts and memories.