I have funded an MSA account from the first day they became available. It is great! We go to any doctor be it medical, dental, chiropractic, mental for my adopted son, get any exam or procedure, negotiate cost and then whip out our MSA Visa card.
MSA/HSA accounts are you being self insured and there is no better way to conduct business in the health care world. I have not looked into over seas care but I do not think it would be a problem, as long as they accept Visa, it is YOUR money in the account.
The money in the account earns interest and you can get it back with no penalty.
Can you tell that I think they are the way to go. My wife is a CPA/Director of Finance/HR director for a multi-million dollar company and she deals with all the insurance companies begging for their business. So she sees what they all have to offer and says that the MSA can not be touched. Hope this helps. Some of the rules have changed since I opened ours years ago, so check on the current rules and restrictions as I am "grandfathered" in on some. Good Luck with your decision.