I just purchased a Jennine with the Genesis system. I'm actually on my way out to the barn to try it on my mare right now. I'm pleased by the leather quality, and my initial tinkering with the tree to get it somewhere in the ballpark of the correct width was super easy.
I just wanted to give a quick plug for Classic Saddlery. They were so, so knowledgeable and helpful in assisting me with selecting the right model -- to the point of actually going into their stock room and sitting in a few models to help me figure out which saddle that would accommodate my long legs would also be comfortable for a much shorter rider who sometimes rides my mare. And as a bonus, they also throw in Toulouse leathers with a saddle purchase, and they are very high quality as well.