I have a hard time balancing your Medicare experience against experiences of family members I know (most issues being long (months) wait times) and with the reports that say Medicare is on the road to ruin if Medicare remains as it currently is. Is it not similar to Social Security in that what you paid in has already been spent on someone else, and the equivalent of what you paid in will probably only cover 5 years of your medical needs.
I myself have concerns about Medicare in the future.
I'm glad to hear its working well for you.