Heritage is a wonderful scent! I wouldn't say it was heavy in vanilla to be honest. Guerlain describe it as a "Woody spicy scent with dominant notes of lavander, coriander and patchouli".
It does have some sweetness though, but this is tamed by the woods and patchouli. An extremely well crafted scent, very smooth and refined.
I doubt you will find it at Boots, possibly Debenhams or the House of Fraser group but I am told that it is being discontinued. This was from a Guerlain account manager, so pick some up if you see it! I know I'm stocking up whilst its still around.
I can't see anyone hating this scent, some do think it smells a little "old manish" but I disagree, possibly because I wore it in my early 20's when it was first released. Its the male counterpart to Samsara, or thats how it was marketed.
Get it I say! If you don't like it I'll swap you!