Flat Iron Mesa is nothing like Fins n Things, Hell's Revenge, 7 Mile Rim, and the others closer to Moab. The ones I mentioned have plenty of slick rock. Flat Iron is more desert-like than the others. 7 Mile Rim is my favorite trail for scenery and optional obstacles, I've led that one many times. Don't try that one alone, it's easy to get lost if you aren't familiar with the trail.