I like the customizable cellar layout of Avos Vins and i find its reports more informative.
The pronunciation and dictionary features of Cellar! are pretty neat though.

Both programs take some setting up and yes, i agree with mdrew that some auto download features to fill in wine selections and so forth would be great, but highly unlikely.
At least the apps have lists of wine regions and many names already embedded so a complete typing of that information may not be necessary.

"Those who preach the myths of audio are ignorant of truth."