Hey Moss,
I didn't get a chance to try the TreeFlex. From this picture of the saddle it looks pretty comfortable. I was thinking of getting a saddle with a bosun's seat but after trying out two or three brands in small and medium sizes, I realized that I like the leg loop type saddles (like my New Tribe) much better.
ShelterTree had two new saddles that weren't for sale yet. One from Austria and another they just got in Saturday morning from the UK. Both were very comfortable, light weight and about half the price of the Strasser designed saddle.
Bob