I rode step rail boards about 15 years ago and loved them. The concept of the narrow rail cutting into the wall of the wave works well. No more big boxy fat rails. Looking closely at that board it looks like it will surf good due to the rocker, rail outline and the nice smooth rounded pintail.
It should be fast and loose, and you will be able to really lean hard over into your turns so you will need to be a reasonable surfer to get the best out of the design. It would make a great beach break board. Go for it
