The Discmania P1 is the archetype of a putter that suits everybody. It has a very neutral and glidey flight, so it is also good for learning clean form. When you learn to drive with this putter, it will teach you a lot about your throw. The straight flight pattern also makes putting a joy.
About the P-line plastic:
P-Line plastic is one of the grippiest plastics out there. Discs have a great feel and added glide. P-Line plastic is typically a bit more understable compared to S- and C-line plastic. As a disc wears down, the flight pattern will vary a bit from the original, becoming less stable. The plastic feels different is different molds.