I didn't answer the poll because I don't fit any one option. I do have experience of several of options though. Up to just over 30 years ago I lived in England. Since then, I have lived in the USA. I have a good friend that keeps me in touch with things in the UK. My sister lives in Denmark with her Danish husband.
England as I experienced it:
I never had to worry about getting medical care, or paying for it, if I needed it. Minor conditions, like my hemorrhoids, very uncomfortable but not life threatening, were subject to a very long wait (I was told 18 months). I had BUPA (private insurance) through my employer and the surgery was done in two weeks.
England as it is now:
Apparently FUBAR. Long waits and no regular check ups. The basic system is still in place, but time is running out. That makes it a neglected system not a bad one.
USA as an employee with benefits:
Good and prompt service, but with co-pays that didn't bother me but could be onerous for some. Worrying that some stuff was not covered, and the ever present fear of losing coverage if I got fired or left voluntarily to pursue uninsured employment.
USA as an employee with no benefits, someone on Medicaid, etc:
No direct experience, but based on some friends in that position, pretty rough. For example, although Medicaid is there for the poor, try finding a doctor that accepts it. I don't know a lot about Obamacare, I believe it has improved things somewhat.
USA under Medicare with a Medicare Advantage plan (now):
Excellent care, prompt treatment, built in yearly health checks, free tier 1 and 2 drugs. Undoubtedly the best healthcare I have received in my life. Co-pays are high and could be difficult for some. Example, I was prescribed PT for my arthritic shoulder and I was having two appointments a week until I discovered that each appointment was costing me $40. The pain wasn't too bad so I quit. Last year I was diagnosed with bladder cancer. It was caught very early and surgery followed immediately, cost about $700. No recurrence since. I get a check up where they look into my bladder every three months. It costs $295 each time.
USA generally:
No system that leaves any single person uncovered can be described as "good". It's great for those who are covered, but not so much for everyone else. Drug prices are ridiculous for those that don't have insurance, and not much fun for those insured and on the more expensive levels of drugs. The uninsured are charged ridiculous prices to make up for people that don't (can't) pay their bills. If you are caught between being poor enough for Medicaid and being covered at work, God help you.
Denmark:
Both my sister and her husband have MS. They have people come in to look after them three times a day. She is often taken into hospital for a few days with bladder infections (she has a permanent catheter). They pay nothing for any of this.