MattonaiseNice stuff, but not that nice. I can assure you--the difference between this and the standard tri-ply won't show up in your cooking--only your wallet.
MattonaiseAC is the gold standard of stainless cookware, and it carries a hefty premium. However, you can get tri ply stainless sets that provide 95-99% of the benefits for a more wallet-friendly cost. I recommend honing your technique on cheaper alternatives like Tramontina, Cook’s Standard, or Calphalon tri ply. I own Calphalon, and I picked up all my pieces at overstock stores like TJ Maxx and Ross for pennies on the dollar.