Cyclamate is used in some parts of Europe (like Germany) together with aspartame and acesulfame-K. I find the cyclamate smoothens the somewhat bitter aftertaste.
Cyclamate is banned in the US based on a flawed 1969 study that supposedly showed it to be carcinogenic. It's legal in most of the world, including the EU.
Yep, one of those places where the US thinks it's bad and millions of people elsewhere are just fine.