94-Points by Wine & Spirits, Vinous, Robert Parker.
The 2014 Merlot Reserve Mailbox Vineyard has traditionally been one of the top Merlots made in Northern California. Beautiful deep black cherry and blackcurrant fruit with some spice box and earth jump from the glass of this dense ruby/plum colored wine. It is rich, medium to full-bodied, pure, textured and serious. This is a beauty to drink over the next 12-15 years.
 
Robert Keenan Winery is a Napa Valley wine producer, located in the foothills of Mayacamas mountain range in Spring Mountain District. The estate produces a range of wines, focusing on the Cabernet Sauvignon and Merlot grape varieties.
The estate was originally planted in the 1890s to Zinfandel and Syrah, but the property was abandoned during Prohibition. It remained unoccupied until Robert Keenan purchased the estate in 1974. 
The Keenan family still owns the 69 hectare (170 acre) estate, about 19ha (48 acres) of which is planted to vines. The vineyards are farmed sustainably and planted to Chardonnay, Cabernet Sauvignon, Cabernet Franc and Merlot on Spring Mountain's steep, rocky mountainsides.
The estate's top wines, the Mernet Reserve, a blend of Merlot, Cabernet Sauvignon and Cabernet Franc, and the Reserve Cabernet Sauvignon, are both sourced from the estate vineyards.