I have a pretty close friend who was raised in the SDA. He had to even go to their own parochial schools - the parents were hardliners. They eventually divorced with the father going to no religion and the mother going even more radical on Sabbath, etc. Richard (the son) quit as well about the time of Vietnam, played with Scientology after that, and now hates all conventional religion.
Anyway, his take on them is that they do not raise to the scary level of Scientology or JWdom, but they may be hiding a few little secrets of their own. For one thing, they almost approach the JWs in the attempt to control education in some ways. For example, it was frowned on to go to college if you wanted to be a scientist, politician, or whatever...but it was sort of OK to go into medicine! They do not completely shun people like Richard who just quit, but they do give him what for on family holidays...you will die if you don't come back. I think they really believe they are the only ones.
However, there is apparantly nothing like the rabid control from a central organization.
Nevertheless, the JWs have a lot of 7th day DNA. I cannot forget that they were before WT with the failed end time chronology and fostered the splinter groups that got Russell started. They have just evolved further than Brooklyn and are avoiding making themselves look stupid again, IMHO.