The problems are miniscule compared to the US system.
Let's say you're poor in Canada, and need an appendectomy. You get it done.
In the US you drag yourself to a hospital, explain your circumstances 5 times, the emergency care is performed and you are sent home.
To face endless harassment from bill collectors, your minimum wages confiscated, and more bill collectors.
Sadly, many people with health insurance in the US, usually a negotiated item in a union contract or offered by employers only to avoid a union contract, don't give a rip about anyone but themselves. That the US has a huge underclass without insurance bothers them not one whit.
Just read "our" Conservatives on the subject.
Arf