*Disclaimer I sell every harness discussed here.*
In addition to several other harnesses/brands/styles, I've owned the Dakine Fusion since it first came out in 2001. I ride them until I wear them slap out. I fit people in these all the time and can say with absolute confidence that if you're getting a wedgie with THIS harness, it is b/c either:
1) This is the wrong size for YOU (waist size will not necessarily be the only deciding factor here; individual body shape plays a role, too) OR
2) You have the leg straps adjusted incorrectly. They should be snug, not too tight or too loose. Either of those scenarios will cause discomfort. Too loose and the harness will ride up. Too tight and it will also feel uncomfortable (sing soprano, anyone
)
Seat harnesses are not for everyone, but they certainly have their advantages, as you've already discovered. If you'd said, "I don't have as much flexibility for boardoffs, getting the board on, etc...I'd agree that that is true. I take mine off to roll up my kite b/c it's not very comfortable to try and bend over much to do it. But, for overall comfort and keeping the harness down, it's a nice trade off. The Fusion is the Cadillac of the seat harnesses, IMHO. If I'm not riding one of my waist harnesses, the Fusion is what I take. Good luck and hope that helps!
SENDIT!