NYH,
The original design extractor has been working well for almost a century. With that said, the extractor on the 1911 platform has always been considered by some as a weak point. The extractor must be properly heat treated and tuned to function properly. I've never had a broken one, but they are easy to remove and replace should tuning or replacment be required. Some regard the external, spring loaded extractor as an improvement. I'm not so sure. I could live with either one though. They both do the same job. Guess it just depends on your point of view.
Savage