One thing you have to keep in mind is that this isn't health care, this is health care insurance.
You pay the insurance company every month, and then if you need to go to the doctor or have an operation, you still have to pay for that, too. If you're lucky, the insurance company will cover some or most of it, but you'll still be paying. My wife had to have surgery earlier this year, and I'm on a fairly good insurance plan, but between all of the doctor's visits, tests, and the hospital stay and surgery itself, it easily cost us several hundred dollars. The insurance company covered several thousand, which is certainly nice, but it still wasn't cheap for us.
Fortunately, her surgeon managed to convince the insurance company that it was a mandatory procedure. Insurance companies also frequently pay little or nothing for procedures or drugs that they consider optional. My wife also has a pill she takes to prevent debilitating migraines, which they consider optional, so we get to pay a pretty good amount for that. We can afford it, but a poorer family definitely would not be able to.
Personally, I think having a health care system like Canada's would be great, but the ACA is far from that.