Tim Atkin - Hacienda Monasterio Reserva 2015 - 96/100
A riper year 2015 may have been, but this scented cuvée of Tempranillo with 20% Cabernet Sauvignon shows no sign of the heat, even though it comes from one of Ribera del Duero's warmer sites. Cassis, red cherry and wild thyme flavours combine appealingly on the palate, with scented vanilla oak and some chalky freshness. Wears its 15% alcohol lightly. 2021-27

The Wine Advocate # 246 -  30th Dec 2019 - Luis Gutiérrez - 2015 Hacienda Monasterio • Reserva - 93/100 - 2020-2028 
They still produce a limited quantity of 2015 Reserva from eight hectares within the estate vineyards, an east-facing plot of very pure limestone, and the final blend has some 20% Cabernet Sauvignon. 2015 was a very warm and ripe year in Ribera del Duero, when the grapes achieved 15% alcohol without any problems, and the wine shows the ripe year for Cabernet. It does have the refreshing addition of the limestone soils that help to balance the wine. 37,525 bottles produced. It was bottled after 30 months in used barriques.