Criticism of the Seventh-day Adventist Church

Criticism of the Seventh-day Adventist Church includes observations made about its teachings, structure, and practices or theological disagreements from various individuals and groups.
Major critics.
One of the most prominent early critics of the church was D. M. Canright, an early leader of the movement in the late 19th century who apostatized and recanted but later left and became a Baptist pastor.
In the middle of the 20th century, evangelical Walter Martin and the Christian Research Institute concluded that the Seventh-day Adventist church is a legitimate Christian body with some heterodox doctrines and stated, "They are sound on the great New Testament doctrines including grace and redemption through the vicarious offering of Jesus Christ 'once for all'. However, other scholars such as Calvinist theologian Anthony A. Hoekema, who did not agree with the Adventist view that Jacobus Arminius's theology was in line with Adventism, believed that Adventism was based on a Wesleyan/Arminian stream of theology, and grouped Seventh-day Adventism with Mormonism, Jehovah's Witnesses and Christian Science in his book "The Four Major Cults".
In debates regarding the inspiration of Ellen White during the 1970s, Adventists Walter T. Rea and Ronald Numbers wrote material that some felt was critical of Ellen White. 
The most recent and comprehensive critique of Ellen G. White is a highly sourced, well-documented book, "Ellen G. White a Psychobiography", by Steve Daily, a church historian and licensed psychologist. This book describes the pathology of Ellen G. White, the "prophetic" co-founder of the Seventh-day Adventist Church. In reference to this explosive volume, John Dart, a longtime religion editor of the Los Angeles Times wrote "a devastating work. What Numbers and Rea started this book will finish."
Church doctrine.
Trinitarian views.
Some Christian critics of Adventism contend that the current Adventist view of the Trinity is not orthodox and/or constitutes Tritheism.
Several Seventh-day Adventist scholars have acknowledged that the Adventist view of the Trinity tends to differ in some aspects from the inherited traditional Christian view of the doctrine. According to Dr. Jerry Moon, emeritus professor at the Seventh-day Adventist Theological Seminary, Ellen White, the co-founder of the church, taught that the Father, Son, and Holy Spirit are three distinct beings yet are united as one in the Godhead.
Moon explains that Ellen White was raised trinitarian but adopted a different view from the traditional one and contends that White's later writings on the Trinity is not the same as the view rejected by the early Adventists.
Critic A. Leroy Moore contends Adventists reject the orthodox view, and contends that the view probably would have been branded as Arian by the orthodox.
Christology.
It has been alleged by the Christian Research Institute that Adventism teaches that Christ "had" a sinful nature. Adventists hold that Christ came as fully man and yet still fully divine, and covering the nature of Christ state that Jesus Christ inherited Adam's fallen nature that has been passed on to all of humanity but did not sin. Such a belief is based on the following texts:
Adventist doctrine is that God took "man's nature in its fallen condition," but yet "Christ did not in the least participate in its sin", which shows Christ with post fall humanity but a sinlessness of Adam before the fall Mainstream Adventists believe that Jesus was beset with all of the moral weaknesses and frailties that ordinary humans experience. However, he did not have the propensity to sin. Christ could be tested by temptation, but like Adam before the fall, did not have the ungodly desires or sinful inclinations of humanity. Ellen White states "The Lord Jesus came to our world, not to reveal what a God could do, but what a man could do, through faith in God’s power to help in every emergency. Man is, through faith, to be a partaker in the divine nature, and to overcome every temptation wherewith he is beset."
Despite this, he managed to resist temptation both from within and without, and lived a perfectly obedient life. Jesus is therefore set forth as the supreme Example in whose footsteps Christians must follow. The fact that he overcame sin completely, despite having no advantage over other human beings, demonstrates that we too can live a life of complete obedience by trusting in him. Ellen White states "The Lord Jesus came to our world, not to reveal what a God could do, but what a man could do, through faith in God’s power to help in every emergency. Man is, through faith, to be a partaker in the divine nature, and to overcome every temptation wherewith he is beset."
Adventists are firm believers that people are saved by faith and not through works, however works are the necessary fruits that are proof of God truly being given a place in our lives.
And:
Investigative judgment and salvation.
The "Investigative Judgment" doctrine is defined in the Church's list of fundamental beliefs. In reviewing this uniquely Seventh-day Adventist doctrine, non-Adventist critics contend that it is not Biblical teaching.
Adventists answer that the "Investigative Judgment" doctrine is not about celestial geography, that a judgment of works is compatible with the gospel, and that Scriptures like and Matthew 25 teach an end-time judgment of the Church. They believe that the "end time gospel" of did not sound in the first century but applies to our time. Also, many Adventist scholars interpret the references in Hebrews as to do with inauguration of the heavenly sanctuary, taking as parallel to , a view shared with certain biblical scholars of other faiths, instead of the Day of Atonement event as interpreted by critics.
The essence of Old Testament sanctuary typology that Adventists rely on for their eschatology may be summarized as follows:
As to the 1844 date, Walter Martin wrote:
Catholicism In Eschatology.
Like the Protestant Reformers, some writings of Ellen White speak against the Catholic Church in preparation for a nefarious eschatological role as the antagonist against God's remnant church (the Seventh-day Adventist Church) and that the papacy is the beast that emerges from the sea (Ap 13). Many Protestant reformers such as Martin Luther, John Knox, William Tyndale and others held similar beliefs about the Catholic Church and the papacy when they broke away from the Catholic Church during the reformation. Unlike most protestant denominations the Adventist Church opposes the ecumenical movement.