The new kid on the block, first produced as a limited cuvée in 2011, is this unusual blend of traditional grapes, with other rarer Mediterranean varieties, 30% Xarello, 20% Xarello Vermell (a clone of Xarello which has a pinkish skin), 20% Sumoll (a red grape), 20% Bastard Negre (apparently Graciano, which I've never heard before), also a red grape, and 10% Parellada; it is a wine with low alcohol and high acidity that provided sharpness. The Xarello and Bastard Negre are planted at the highest altitude in the property on stony soils and produce very low yields, and the Summoll and Parellada were co-planted some 50 years ago, sourced from a local producer from the west of the river banks of the Arnoia River. The wine matured in contact with the lees for some 42 months and no sugar was added to it, so it's a Brut Nature. It's a darker shade of yellow, like a blanc de noirs, and it felt very serious, with a slightly closed nose. It develops more oxidative and lees notes, with smoky aromas and a core of ripe yellow fruit, exuberant and with a nice mouthfeel, very dry and tasty. This is closer to something from Selosse than Larmandier. This is a great addition to the portfolio, a nice complement. 2012 was a very short vintage and they produced 8,132 bottles.
Luis Gutiérrez, The Wine Advocate. 28th October 2016. 

Lots of complexity on the nose and palate: refined brioche aromas and white fruit intensity in a powerful, focused style. It is thrillingly zesty, structured and weighty so it has the ability to age well. There is a hint of wood ageing on this savoury, textured style. Fine mousse and excellent length too.
Christelle Guibert, Sarah Jane Evans MW, Andy Howard MW - "Best sparkling wines of 2016: Five greats" in Decanter, 8th Dec 2016