New to me anyway.
Self adhesive, seem to really grab tight. No worrying about staples scratching coins or rusticles leeching into the cardboard, or worse. I also like having more room to write on.
I prefer the Quarter size for cents, nickels, and dimes. And 50 cent flips for quarters. I think they look nicer sort of suspended in air (the slabbed look)
A small box of 100 was $16/shipped on ebay.