American asking - how does your country's healthcare system perform for you?

So I've almost (March 29) quit an IT role in a U.S. company that functions with the private healthcare market. It's been long evident to me that most industrialized nations have much more sensible systems, and my employer's business model would be nonexistent outside the U.S.

There's a current political trend towards "Medicare for All", basically a single-payer system for existing health services. The prevailing resistance comes from insurers, whose business models will cease to exist, and those whose compensation might be cut (physicians and hospitals) up to 50% under the current scheme for U.S. Medicare. That's leaving aside pharmaceutical companies.

I'm trying to decide where my political time should be spent - the "Medicare for All" slogan is great for bumper stickers, but are there other models that work better?

Please talk about your nation's policies - the good, the bad, and the ugly. Tildes is mostly a young crowd that might not have direct experience of major medical need, but any commentary on what has worked and what doesn't is welcome.