pf flyers are good, although the older model soles feel much better.
old model
old models have a very thick vulcanized outsole that lasts a very long time, deeeeep tread, good grip, thick canvas, and they feel broken in feel right out of the box. they are comparable to some vulcanized adidas skate shoes in quality.
new model
new models squeak a lot but they don't actually grip the board well and don't last as long since the tread is so thin...the board feel isnt great either. its like skating a normal jack purcell or some shit. other than that, it's basically the same thing.
oh and knock off pf flyers are good too, as long as they have the old sole. you can tell theyre knockoffs by how thin the canvas is and how the patch on the ankle is sewed on fabric and how the soles are fully gum colered/don't have the black pf flyers lettering.