I hate to disagree with the esteemed gentleman from the north, but I hated the damned things. You would start to write some long word like "revolution", and it would start to fade by the letter "l" and not finish the "on".
On top of that, when "erased", they would leave a ghost image on the board that required a rag (which quickly became quite disgustingly colored) and some magic spray from a bottle (but not too much, or it'll streak). Coupled with that, they were yet another way to sucker the always gullible powers that be in education into giving more money to the suppliers. In the good old days, you got a piece of chalk that cost a penny and lasted for the whole day and then some. With the white boards, you could sell lots of markers for a dollar each that would last for most of a word before running out.
So basically you're an..........................................
anti-capitalist?
All those sprays, markers and stuff being used and sold is money being made, and taxes being paid.
Not to mention.........................sniffing chalk don't do nothin' to change one's attitude.