|My impressions come from an older tin of Mountain Leaf before Lane went strictly to pouch blends.
Aging doesn't really mellow Burley much in my opinion. It will certainly alter the intended taste of aromatic blends though. I think Mountain Leaf's aromatic agents in my tin were very hard to detect. My palate engaged mostly quality Burley leaf that never got bitter near the end of the bowl.
This one burned cool and dry - but very fast.
Although not a bad blend, Mountain Leaf was very uninspiring. And, if I found another tin on ebay, I would not place a bid.