Present-day Western seekers will probably not find much of interest in the DMC... being put off by the regimented “group-think” aspects, as well as the bizarre, and suspect, meditation claims.
But, in the middle of the last century, when farangs were first venturing to Thailand in search of teaching, there was, as yet, no mega-church-like organisation to put them off. There was just Wat Paknam and its abbot, Chao Khum Mongkol Thepmuni, who had a good reputation.
In this history ot The English Sangha Trust: http://www.buddhanet.net/filelib/pdf/honourfathers.zip
there are records of some such encounters.
The Venerable Kapilavaddho became the first European to be ordained as a bhikkhu in Thailand (page 34), and, according to the written testimonial of the famous abbot, “... completing his training on attaining the highest ‘Dhammakaya’ state in nine months. The only national other than a Thai ever to have accomplished this.”(page 36). He then returned to the U.K. to aid in the establishment of the English Sangha Trust. He taught the “Wat Paknam” method of meditation at first, but later seemed to abandon it for the Mahasi method. There follows (page 38) a brief description of the method, and some speculation (page 43) as to the reason for the switch of methods.
In any case, there are no further reports of the method being taken up and developed to a noticeable extent in the U.K.
Bhikkhu Kapilavakkho retired from the Sangha in 1957, his position taken over by Ven. Pannavadho, who, in turn, was replaced by Ven. Anandabodhi (page 52), who had also studied at Wat Paknam.
Ven. Anandabodhi later became Namgyal Rinpoche, and did teach the method, amongst others. It was referred to as the “16 Buddha body” meditation, probably derived from the book published in English by Wat Paknam “Samma Samadhi”, which contained illustrations of the 16 bodies to be visualised. But after circa 1973, there was not much mention of the method in his group.
Around that time, Tibetan Buddhism was gaining popularity in the West; and it might be possible that the Wat Paknam method, which combines mantra and visualisation, suffered by comparison to the vast array of Vajrayana methods utilising the same two tools. But that’s just speculation on my part.
I hope the pdf might be of historical interest to some.