I have quite a few PP art markers.  When I began doing more serious adult coloring and my own art work with these, I really grew to love, love, love, them.  They are definitely professional grade with prices to match.  I also have some Copic markers, and I love those too.  And I know many will disagree, but I think PP & Copic are pretty much equal in their performance and stability.  I think your preference depends on the type of art work you do and how you work. And PP are less expensive per marker than Copics, but NOT refillable, which can make them more expensive than Copic in the long run.  Finding a favorite brand may take a lot of experimenting and I also use less expensive Spectrum Noir and a number of others to a lesser extent.  I get great results with SN; vivid colors and smoothness and pretty good blendability, BUT they tend to bleed and smear more than PP & Copic. Grade of paper will also affect performance (generally, the thicker the better for all you new to alcohol markers.)  Deco Pink & Ballet Pink are my two favorite PP colors....absolutely lovely!