Ranger: When i do crane work i usually carry a 372 on one hip, and my rope bag with 150' of rope on the other. I have found that having the extra shoulder supports helps to hold that weight up, instead of my saddle slipping down on me all day.
the benefit of fall arrest is that it can be used in the bucket truck w/o switching saddles, also most TCC are making it mandatory you have it for the speed climb, and footlock event!!