I think their lower vineyard has produced much better wines over the last 10 years. The old estate bottling's were not close to the class of the PM's but not so sure I would say the same about the newer ones. The last few estate wines I have had from their lower vineyards have been excellent.

I have a vague memory of hearing that they did use some declassified barrels from PM in the estate bottlings too, but can't really remember the details.