What video camera - Sony Smooth Slow Record Opinions?

My old one just died and I want to get one that offers the ability to get more fps. I was already going to get a high def camera but noticed that the HD sony’s have a feature called “Smooth Slow Record” defined as
increasing the record rate from 60 fields per second (fps) to 240 fps for 3 seconds allowing you to capture 3 seconds of fast motion and play the video back in 12 seconds. This is great for analyzing a golf swing or a viewing a bird in flight. Anyone have any experience with these?

Here is a link to one on Sony’s website.