I think Bobby Hampton (above comment) summed things up real well here. I like these caps a lot and although you do have to press down and forward to use it, it's not beyond the wit of man and kind of reminds me of a dual action airbrush function. I'm able to get nice lines and smooth blends with this cap. All around a great "do it all" cap.
So far I have prototyped these just making lines and some practice fills and I really like the feel and control of these caps. Nice squared lines that vary with can distance from surface and the fill ins are solid and smooth.