I have been using "long putters" on and off for 23 years. Have tried all of the major brands and at times, been very happy. But I always went back to shorter putters including various "Dual Balanced" models from again, the major manufacturers.
But being a person that's always trying to improve their putting (who isn't?) it's been back to the longer models.
Found my first Longwood Putter while visiting the CC of Maryland Pro Shop. Fell in love with the LP-1. Great feel with moderate success. Then I stumbled onto the LP-3 model. It was love at first sight. Love the looks even more than the LP-1. No "inserts, which gives me the feel I want. The LP-3 with the Stability Shaft is the best feeling putter I can remember.
I do believe the increasing use of the long putters we see on television will translate into more of us average players considering their benefits.
Longbow Putters could very well be in the forefront of this movement.
Try one, you won't be disappointed.