Great, now I have to figure out which creams or soaps don't break down in the heat.
Just got my G12 yesterday and used it this morning. Filled it with hot tap, filled bowl, showered, emptied and fill again with hot water. I used Proraso Green and had no problem with lather breaking down. It was easier to lather and produced more lather. The lather stayed warm for 3 passes and touchups and probably good for a few more passes if needed. Worked great and convinced me it was a nice investment. Amazing to feel warm lather with each pass.