The 1998 Petaluma Coonawarra is probably one of its best. It is a 70% Cabernet Sauvignon, 30% Merlot blend. The Cabernet percentage is higher than usual, as the warmer vintage allowed these grapes to ripen well.
The fruit is very clean and pure blackberry and blueberry. The tannins have softened and the wine has good length. The one gripe I have is that the wine rolls along the tongue in one block and does not linger around as much as an absolute top wine would.
It is probably a good time to drink this wine now, but it will stay at this level for a number of years.