The non-stellar nature of this object is apparent even  in smaller scopes at low power.  At higher magnifications it appears as a very bright, round ball.  Many observers report a distinct blue-green hue.  In a 6" I felt that there was "some hint of the edges being brighter."  Look for a faint star just to the east of the nebula.

My recent observing notes using my 18-inch:

I had never before observed this planetary nebula in a large instrument. It was a real treat! Even at 82X it was large, bright and obvious.  My notes for 166X simply say "wonderful" and "amazing!" But it was at 333X times that this planetary really shined, despite the poor seeing.  It is nearly round and has a high surface brightness. The edges are not distinct -- they appear lumpy, almost like looking at a barely-resolved ball of yarn.  It has sort of "ropey" edges.  I was surprised that with averted vision I could plainly see a small, dark,  round core (making up perhaps 10% of the object). Another surprise was an apparent bright area just to the south of the dark center.

Above: the view in a 6" at 50x. North is down, east is right.

The image above is taken from the DSS using SkyView. It shows a 1/2^o field with the same orientation as above. Note the non-stellar appearance of the nebula (center).

This HST image reveals the fine structure inside of the nebula.