No, I have not used one. And I would not use one. Noseless saddles are dangerous. Not only can you fall off the saddle (especially when turning), but the nose is important for controlling the bike (especially when turning).
There are many ways to resolve your issue. Some will suggest trying other saddles. Some will suggest experimenting with saddle tilt. I will suggest something much simpler, and that is to pedal out of the saddle for at least 20 seconds out of every 10 minutes (i.e., get off your butt every once in a while).