They catch most people out; so different from the 16yo, totally different beast. Much more ardbeg than lagavulin i think.
I try to get one each year as they are the only really affordable diageo special release (dont care for Caol Ila too much). Last years was more subtle and sweeter than previous so they always keep you on your toes :-)
Absolutely worth seeking out if you're an islay fan, you're world will not be the same again.