Steam Ovens - a good thing or just for those with money to burn?

[extremelychocolateymilkroll]

Was all set on getting a lovely new normal Miele oven when SIL raised queries about the chemicals emitted by catalytic ovens. Does anyone have a steam oven and would you recommend one? TIA

What is a catalytic oven and how does it emit chemicals?

Strike that.... ovens with self-cleaning surfaces. I thought the surfaces weren't volatile and the main chemical produced was carbon from burnt on residues.

Thanks for your responses Cogito. I don't know all the details but apparently they are made of the same stuff which Tefal uses and this can kill birds if used at high temperatures. Also, the kitchen man in John Lewis said that some people had mentioned that the food they had cooked in these ovens tasted different.