Casillero del Diablo is probably the most well known Chilean brand in the whole world. I can’t remember the first vintage I tasted, but I liked them early on, and then less and less as my palate evolved. I have not tasted any in the last 7 years or so and spotting it on the shelves of Tesco made me nostalgic for the old times.
As far as I can tell Grenache is on the rise down under, at least some bloggers are enthusiastic about the variety. I can see why, when tasting wines like this Willunga The Hundred Clarendon Single Vineyard 2015 release.
I loved the 2016 vintage of this wine, mostly when it was in its primary state, though (2016 Southern Rhone reds quickly went into a dumb phase in my experience, see also here). The 2019 is good, but not on the same level.
Just what I expect from a Tesco Finest wine: restrained and elegant, like the other wines in the range. If I’m not mistaken Master of Wines do the selection for Tesco, and they always pick the balanced, pure wines, not the over-oaked, over-ripe examples.