My wife has been riding the Butterfly Gel for several years and is very happy with it. She got a TDF trainer for her birthday but couldn't stand the saddle it came with. It was a no-brainer to get another Butterfly for it as the cold weather looms ahead.
I rode my new mountain bike with its original saddle for several weeks, always hurting after each ride (think narrow, hard Specialized saddle). I just kept thinking that I would get used to it! However, I decided to go for this saddle, which was very reasonably priced. Nothing hurt afterwards, and my lady bits are thanking me! I am never sore anymore after rides that last several hours. Highly recommended. Best accessory so far!