I agree with Jay,

Subd's have a few issues that have been around since all the way back to maya 3.

I tend to use smooth mesh preview (3-key).

One of my gripes with maya subd is that one of its major strengths is to add localized detail and to be able to crease but if you toggle back to polygon for any reason you LOSE all your subd details and have to add them all over again once you go back to subd, which is a waste of time.