Can someone tell me how to use this kind of stove ? Is it true that only works with metallic pots, since the top is flat, I must use flat bottom pots to get larger area of contact ? 5 P" J4 N& [: A J# K" u5 L1 I 4 }9 r0 B* z, O' G& q& @2 x/ pAlso what's the difference between current model of Malata Karaoke player compare with earlier models % a' N' b8 c$ g" e$ V0 tThanks for help.