Worth getting as long as you dont expect any pre-existing issues to be covered. In other words if you have already seen your GP about a specific medical problem, the chances are that private cover won't cover it.
This is definitely good advice; however certain policies will cover pre-existing conditions.
I have had private for a few years and required two knee and a back op in that time. The standard of service and healthcare is superb.
Definitely worth it in my opinion. £50-60 per month per person is a reasonable price; however you can get this cheaper for couples, families etc.
I have always been with BUPA and cannot fault them. Even get physio via them too.