To give an idea of hospitialization costs - a good friend of my wife's went to Hospital Aleman a little over a year ago to have her baby. Her husband insisted that she get the best care. She was given a private room for two days. The total cost was $9,000 pesos, which at the time was about $3,000 dollars.
I would expect that cost to have risen since then, maybe as much as 30%?
I'm sure for a more common delivery experience the price would ahve been significantly lower.
Insurance here is cheap enough that I would not consider living here without it unless you are reasonably welathy and can afford whatever is thrown at you in life.
I don't agree that OSDE is necessarily the "best" because of the cost - it is certainly good insurance and the network has very good doctors, no doubt.
Hospital Aleman is a good hospital and has good doctors as well. I pay $550 pesos a month for two of us. HA is certainly competent for about anything that you would need done, in my opinion.
It all depends on how much you want/can afford to pay.
Just do not, ever, depend on public hospitals.