I recently got into a debate with a family friend over his beliefs as a seventh day Adventist. Here was his larger argument when I confronted the teachings of their prophet Ellen G White:

Brandon Grady I want to thank you for all your post! Some folk might not like someone making all these negative comments but a wise man once said, "ALL publicity is good publicity as long as it's not your own obituary"! So even though you seem to thoroughly dislike Jesus Christ, Christianity and ESPECIALLY Ellen White you are still doing a good job keeping this post and Ellen White before the people. These types of attacks are nothing new of course. Ellen White said this about it:
"Leave Sister White in the hands of God. If the work in which she is engaged be of God, it will prosper; otherwise it will come to naught. But remember that your own eternal interests are now at stake. The fatal lethargy upon you must now be broken, or it will result in endless death. “How long halt ye between two opinions? if the Lord be God, follow him; but if Baal, then follow him.” In Christ’s stead, I beseech you to pray as you never prayed before, to seek earnestly for faith and love, that seem to be almost banished from the earth. Live each day as in the sight of God.." RH August 28, 1883, par. 22
So has her work come to naught? Well let's see... I know many years ago the Great Controversy had been translated into over 70 different languages and the new translations keep increasing! This book is a WORLD WIDE best seller and I know at one time (and I believe is still the case now) the only book out selling it world wide is the Bible its self! Ellen White is also the Most translated American author! As a result of her work the SDA church has prospered and is one of very few world wide denominations currently at 18 Million strong! It seems to me the obvious answer to the question is NO because her work has definitely produced much good fruit!! As for her being a true prophet.. There are at least 7 Biblical test of a prophet and she passes them all with flying colors!! One of the clearest examples of a true prophet is found in Isaiah 8:20 (KJV) To the law and to the testimony: if they speak not according to this word, it is because there is no light in them. As you can see from the above quote she is also quoting Scripture, 1 Kings 18:21 and you will find that ALL through her writings! She ALWAYS points us back to the Bible and to Christ! She says, "I'm the lesser light He is the greater Light!! For hours she would be in vision pointing to verses in the Bible and reciting them word for word all the while looking up to heaven. Candles and mirrors were held up to her mouth and there was no breath coming out! Very strong men tried to move her but they were not even able to get her pinky finger to budge! All of these things were done by severe critic's like yourself who wanted with all their hearts to prove her to be a fake!! Everyone of them failed!!
Brandon, I've know you since you were just a baby and I've known a lot of your family much longer than that! I can honestly say I love you and your family very much! Your friendship and theirs is very important to me. I have shared the very same feelings as you in times past. I'm ashamed to admit it but I have sat around with different members of your family and other friends as we roasted Ellen White!! As I've reflected on those times it actually caused me to read and study her writings along with the Bible! In doing that I have been amazed at how much clearer the Word of God is! I have a friendship with my loving Savior Jesus Christ that words cannot describe!! Criticize if you like all I can say is He is very real and I've never had more peace and assurance of the future!
I must say I'm rather surprised that you would take time out of your happy go lucky life put forth all the effort to post all this. I mean criticizing over mustard, corsets, thin people etc.. are these really the things bother you about her writings? She had a very complicated task before her. Not only to counsel on the situations of her day but also all down through time.. Btw you do know that she never even called her self a prophet and when she was shown what she would have to do she actually preferred DEATH!?? However when she saw the frown of Jesus she said she NEVER wanted to see Him frown at her again! She fell into extreme darkness for many days after that! It wasn't until after much repentance, prayer and even lots of people praying over her that she finally saw the light again... she also counsels about people being over weight too. So once again it's a balance. As for counsel about doctors, did you know that the 3rd leading cause of death in our country is due to medication/wrong diagnosis? Back in Bible times they used natural remedies now they use far to much UNatural remedies. Socrates said, "Let food be thy medicine and medicine be thy food." So even worldly minds can recognize that importance. So some things apply to people in her day and others more to us today! It's important to read the whole body of work and not just "cherry pick" things here and there. You know king Solomon said in Eccl 11:10 that "Childhood and youth are vanity"! And that "ALL is vanity"! And he was the wisest man to ever live and also a prophet! That sounds like some pretty crazy proclamations and that's just one of many such texts in the Bible! That's why must understand the full context.
Well it's late and I must get to bed. I will leave you with these verses... John 14: 6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me. John 10:9
I am the door: by me if any man enter in, he shall be saved, and shall go in and out, and find pasture. Matt. 7:13-14 Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat: Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it. John 10:10 The thief cometh not, but for to steal, and to kill, and to destroy: I am come that they might have life, and that they might have it more abundantly.
The ONLY hope of eternal life is through Jesus Christ... Please chose life my friend! God Bless!!