I have had the over 2.5 months.  The only issue that I have it that when something spilled over to the bottom of the oven, a stain or the finish itself left marks.  I tried to steam clean then tried the oven clean but the finish/stain remains.  I read after that I should have been told to "treat" the surface with something to help avoid this, but I was never given any instructions other than handed the manual.