I'm a long time longboarder, with those you can stop, with these you can't stop.
I tried both..The FreeBord is definitely more tricky to learn, and actually easier at speed...like a snowboard. But the feeling of catching an edge on those wheels was present in my head. Longboard is a much more mellow ride. I'll stick with that and easy grades or pumping for exercise.
2015/16 -17- Kirkwood days
Arbor A-Frame 158 2009-10
Jeremy Jones Hovercraft 156, 2011/12
Subaru WRX 06 - 181K