Sorry for delay in answering you, I am having computer problems.
As Fred has stated, it is not as good a non-stick surface, but it is certainly a lot harder. Even if you do damage the surface, it will self repair next time you get the pan hot. Assuming that you do get a pan very hot before you put anything in it, that is.
One bad thing about this old fashioned non-stick surface, is that it can go on the bottom of a pan and that can be very dangerous, as the pan will slip and slide all over the hob.
HTH
Dave