GoProHD 60fps - Twixtor Test

A friend of mine got a GoPro and I wanted to see what kind of results we could get from the 60fps mode and Twixtor. The downswings of the golf club and baseball bats were still a little too fast even for 60fps and came out blurred and shifty so I kept those parts at normal speed. There are noticeable shifts near the hands and bats. For whatever reason, my results with Twixtor have always been a little less than satisfactory. If anyone has suggestions on successful settings/work flows they would be appreciated