Thanks Checkerboard and others for the info. I am still getting used to it, and the thoughts are welcome. I have been very pleased with it in high level cruise. In teh terminal area I have found it tends to paint the sky as falling: a very "busy" picture - it paints far more weather than is really there. I have tried tilting well up to make sure I am not getting ground returns. If there is shower activity in the area, it seems to paint it as a higher torm level than it really is. First time I saw this I was asking for deviations around stuff that was really nothing other than light/moderate rainfall. It painted up as yellow/red return, whereas C would not have been more than green. Other pilots concur on the phenomena.