I am using the buckingham versatile. i find when i am using the lanyard d rings on the harness it is a little uncomfortable after long periods but when using the attachments the roller strap or five attachment points is pretty comfortable. The hard and most painful part for me was standing on spurs that long my legs where shot.
When i got home and sat down i could still feel myself swinging in the wind that was weird.

it was nice and windy all day.
Greg