I am not a heavy coffee drinker, one or two cups a day. I am having gastric reflux whenever I drink a coffee. My daily coffee driver is Delonghi Ecam 23.420 which does very good coffee. Also I add a bit of dash of Baileys Irish Cream and some milk cream, no difference in symptom but nice difference in taste. It is said that a bit of salt added to coffee grounds before brewing or to a finished cup can reduce bitterness of brew that's too acidic. This method to neutralize the acid in coffee decreasing the chances of an acid reflux flareup.