I brought this chair on my last 40 mile backpacking trip and loved it. It is a very lightweight option and replaces the Crazy Creek chair. The back support and comfort it provides is a welcome luxury at the end of a long day of hiking. It fit my 3/4 length therm-a-rest fine, and seems like it is adaptable to other sizes as well.
It takes a little bit of work to get the therm-a-rest in through the straps and tighten it all up. The straps loosen over time, but not drastically.