I was able to get out on a 10 day trip this month including 7 days on Lake Powell doing explorations and barely betad canyons. On this trip I was able to use the sandtrap for the first time. After being shown how to set it up I had some of the others watch me set it up once or twice to make sure I didn't miss anything. After this I felt confident setting it up by myself wherever we felt the geometry was favorable. It is very quick and easy to use. It doesn't work at every drop but is useful in so many more spots than any other ghosting technique I've used in the past. The least favorable place to use one is a chockstone choked constriction as the trap can get tangled in the rocks, however these are generally the easiest places to throw a sling around one of those chockstones. Places where you would normally need to build a deadman or carin anchor (anchors that usually take the most time to build) is usually an ideal spot to use it, saving HUGE amounts of time. One canyon we did had 9 rappels, all of them off the sandtrap. We would have been in the canyon twice as long if we were building anchors at all these drops. The sandtrap is the greatest invention for canyoneering since tubular webbing in my opinion, it's amazing once you learn how to use it and know its limitations (don't get too carried away trying to leave no trace or you will get it stuck). Always back it up until the last person and make sure you don't accidentaly pull on the pull cord on rappel (that would dump the sand and be very bad).