This particular beer, like many sour Belgians, is a mix of fresh beer and beer that was spontaneously fermented. The spontaneous fermentation results in the sour notes, while cutting in the fresh beer provides balance and keeps the sour from overpowering.
Brewery: Brouwerij Strubbe
Brewery Location: Belgium
Beer: Ichtegem's Grand Cru
BJCP Style: 17C. Flanders Brown Ale/Oud Bruin
Appearance: dark auburn with ruby hues when held to the light; thin tiny head
Smell: The sour notes hit first, with with hints of sweet malt and fruit--strawberry, cherry, and raspberry
Taste: Not as sour as nose suggests, with sweet berry and malt upfront. The sour blends well and balances out the finish, keeping it refreshing and not cloying. Although this beer is oak aged, the wood-imparted flavors are minimal. The BJCP guidelines (see link above) suggest darker fruits and more mellow malt, but the fruits in this example are brighter--more summer than fall.
Mouthfeel: Dry, fruity, and effervescent; slightly sweet, reminiscent of cherry cola, although not nearly as sweet.
Drinkability: A malty, fruity, aged, somewhat sour Belgian-style brown ale that is refreshing and bright. While it isn't the life of the party, it's a guest you consistently invite because you know their presence adds something intangible to the room.