I have seen ex-seventh day adventists discussion boards much like the one we are on that rail against their former religion. In that way it is much the same as mormons and witnesses. I don't have any desire to go to a sda church but I would say it is better than the jw religion in that they can vote, join the military, get involved in after school activities...however they are not supposed to drink alcohol. They still are too fundamentalist in there beliefs for my taste.
That being said, I do have seventh-day adventist relatives who have been very kind to me since I left the borg sort of a replacement family to some extent. They don't seem to mind what religion anyone comes from and don't like how pushy witnesses are. They don't seem to mind that I don't go to church or that I refuse to say a prayer when asked at their mealtimes either. See my experience at the below link: