Well I guess I answered my own questions about the Burley Jett Creek, same as the Koosah. Three hour ride on the Burley today. Bought it yeaterday. Seat is very hard and unconfortable after thirty minutes in the saddle. Acceleration very slow and hills are hard to climb. On the level ground it is hard to get speed, about 12 mph tops for today. On my Linear I could hit 25 or 30, but the USS made it hard to control.
For slow riding the Burley is good and the learning curve is 0, very easy to ride. Good for running to the store and around town, a relaxing slow ride. For a ride over ten miles I would not do it. Seat looks very difficult to remove from the bike, or for that matter adjust the seat angle, although I have not tried yet! Seat back is not confortable. Am I too pickey? My opinion about Burley Jett Creek.