Interesting, as a former member of SDA (family of pastors) and now member of SDARM, I can tell you there are a lot of misconceptions of SDARM, many of them mentioned in the article above.
On another note I think its humorous how SDA's label any off shoot as "cult" While the world labels SDA as a cult.
Now onto the article.
The Seventh Day Adventist Reform Movement (SDARM) comprises a number of ultra-conservative offshoots separated from the ‘mainstream’ Seventh-day Adventist Church (SDA). Thus, the term 'SDARM' is used as a generic term and not necessarily limited to just one legal entity. It is very important not to confuse the 'mainstream' SDA Church with the various SDARM Churches.
In a nutshell, the SDARM are fanatically conservative and extreme, treating ‘non-essential’ questions as ‘salvation' issues and tests of membership. For example, baptism will be refused or Church discipline initiated (i.e. censor or excommunication) on the basis of failing to comply with Reformist standards concerning vegetarianism, long hair and dress reform. They adopt a Pharisaic attitude to religion.
The SDARM arose during World War One Germany, and there is a strong authoritarian German element to their religion. A major split within the SDARM occurred in the 1950s, with two major groups now both claiming to be the SDARM. There are in turn a number of ‘independent historic’ Reformist groups as well.
If you want a quick non bias summery of how the separation happened look at this article by University of Santa Barbara.
Reformist devotees typically seek to live a rigidly parallel life to that experienced by the SDA pioneers, who lived in a Victorian society of 19th Century America. By obsessing with regulatory minutiae, the SDARM arguably can become assessed with law-keeping which in itself can become an idol, defeating the very good to which God originally intended.
The SDARM, like most cults, operate under the guise of Christianity but deviate from the orthodox teachings of the historic Christian faith. For example, they typically reject the doctrine of the Trinity and embrace Tritheism (worship of Father, Son and Spirit as three separate gods) or Arianism (holding Jesus as a lesser 'mini' god).