I have had to learn to adjust temperatures when cooking with this oven.  Most items, like pound cake, I cook 325 instead of 350.  It seems to take longer to preheat, I assume becuase it has a larger capacity than my old GE oven.  I do like using it and I have not had any problems other than learning how to adjust the temperatures.  I have used the convection a couple of time but not with cakes.   I am learning and I am sure I will love it once I cook with it more.