i like them everywhere...if you dont turn agressive enough they dont do a thing but when you really lay that thing on a rail and clamp it they work wonders....i honestly cant ride a sj without them anymore....i just fall over when i try to do an agressive turn....but on my ski i can drag my shoulder all day long...without they the ski feels like it turns on two angles...flat on the bottom or all the way over...w/ tubbies id feels like the rail hooks up at any angle you lay it over on, if that makes any sense.....ihavent tried tubbie IIs yet but there is a set on the rn hull in my gargae so i guess ill know soon enough