Turnbase,
Think of trying to thermal in an Aerochute as trying to do the same in a C150. It would be one hell of a thermal to keep you up. The wing is just not designed to do that. Yet as inefficient as the wing is, like the C150, it is very easy to fly and very forgiving. PPG's have the most beautiful and efficient of this style of wing. Their aspect ratios produce performance I can only dream about but at the expense of my wings advantages. If mistreated they will bite you. Having said that they are still extremely safe. Because of their agility, many daredevils are attracted to them and as a consequence dangerous flying has resulted in fatalities. As with any form of flight, it is as safe or dangerous as you make it.
John