Abby was a wonderful guide for our day long excursion from Da Nang....she was clear in her communications beforehand, flexible to our preferences, and very personable and efficient in the conduct of our journey to Ba Na hills, and Marble Mountain. We are experienced travelers so we probably could have managed this ourselves, but I am so glad we didn't. Abby helped steer us through each of the key things we had on our list to experience one step ahead of the crowds. Saved time/frustration and had a great time talking with Abby who was a great conversationalist and willing to share/interact but was just as happy to let us chill and stare at the lovely vistas in silence. Perfect day.