I found this longish article about the life of Ajahn Maha Boowa, which he wrote himself:
It tells about his childhood, his initial wanting to get married, how a fortune teller came and how he came to be a monk. It tells about his early years with his teacher Ajahn Mun, and how that worthy interpreted his dreams and guided his path. It tells about the visions he had and his response to the visions. Later in life he founded a monastery and stayed there, and became a more public figure in Thailand.
His interpretation of the dhamma seems quite conventional, such as the vision in which he meets the Buddhas who then all turn into golden statues, which he bathes with water. His teaching at his home monastery seems to have been uncompromising but otherwise unremarkable.
I found it interesting, not everyone receives such clear and lengthy visions. But to what extent are visions really a sign of spiritual advancement? In Ajahn Chah’s writing I find a degree of understanding of being, which I haven’t yet found in Ajahn Maha Boowa. I will search on.