The 1998 Cullen Cabernet/Merlot (the predecessor of the Diane Madeline) was such a joy to drink. It has a beautiful complex fruit set, which is just starting to mellow, some earthy characters, and lengthy silky tannins. The wine is seamless, and the individual contributions of Cabernet and Merlot are not detectable.
The wine has medium weight, perhaps a little more than more recent releases. It may not be quite as elegant and refined as the latest wines, but this is splitting hairs. This wine is a very fine example of a Bordeaux blend from Australia.
It really pays to cellar the premium red from Cullen. More complexity unfolds while the wine's structure remains strong. This wine will drink well for another 3-5 years.