I spent the morning at Mostra Coffee’s 4S Ranch Location. Mostra has been around in San Diego for a while now, and has added a few cafe locations in the Rancho Bernardo area. The coffee is very good. It’s pretty typically 3rd wave, but I did not find it to be overly acidic or tart as is sometimes the case. The flat white I had was creamy and flavorful. They have free WiFi and the location has indoor and outdoor seating. The location is in a corner of the 4S Ranch Commons .