Yes, I have used it and with low gravity beers, it is perceptible to me in terms of the added body (I have never used it after going all grain - I must note). So a dry stout with about 3-4 oz in a 5 gallon batch would work well IMO. I never added a pound or close to it. In a sweet stout the lactose addition would suffice on both counts - body and sweetness, so I would avoid the Maltodextrine on that style....