I've read and watched several reviews where the reviewer revealed their fondness of well-aged grain whiskies.
The opportunity to see just how good they are presented itself in the form of a bottle of Douglas Laing™ Old Particular™ Spiritualist Series™ Harmony™, which is a 28 year old single cask single grain from Cameronbridge.
All natural, no chill filtration and no added colouring. Despite all those years in the cask it's just a healthy, golden honey colour.
The nose is fairly shy - faint spices and honey sweetness.
Medium body - oily, but not too oily. Very easy and pleasing to drink. Honey is going to be overused here, but it really feels a bit like eating a spoonful of honey after it melts and dilutes in the mouth. No alcohol burn at all.
Taste: a medley of sweet and spicy all right. Vanilla, honey, and unflavoured hard candy balanced with some vibrant spices. Cocoa, not so much, just a hint of it in the background.
Finish: yeah, this is where the cocoa takes the stage, along with some sherry nuttiness (finally). Medium length, shorter than what I though I'd get from this kind of age.
All the unpleasant grain qualities are absent. No sharpness, no immaturity, I can see why people like it. However, there's also nothing mind-blowingly breathtaking here either - just pleasant sweetness with a great balance of spice and medium body. And I guess this is why they named it Harmony, because it definitely lives up to that name.
Water does nothing to it, and it doesn't really change with the passing hours either. I don't know if it's specific to this particular Old Particular or to single grains specifically. I might try and get an Asta Morris 2006 Girvan Ardmore Cask Finish to test it - or maybe an older blend. Ballantine's 17/21, Chivas 18, or JW Gold Label are much easier to find than aged single grains.
Presentation issues:
The cardboard tubes are uniform all throughout the categories (single malt or single grain) of the Old Particular range, with only the labels differing - and those labels are stickers. Which, in this case, already started peeling off.
And a plastic-topped cork stopper.
Closing thought, out of thin air: this almost tastes like a very sweet bourbon. The overall feel and flavour is different, and so is the finish - but it isn't that far off from a bourbon.