It is interesting how old rumors pop up again and again.
Yes, Joseph Smith did see Heavenly Father and Jesus Christ.
Yes, Joseph Smith did receive a visit from the Angel Moroni.
Yes, Joseph Smith did translate the Book of Mormon by the gift and power of God.
And, no, he did not plagiarize the Book of Mormon. Look at the timeperiod that he lived in. There was a lot that was not then known about Hebrew. At the time, no one had ever heard of chiasmus. It was not until the 1930's that anyone discovered it in the Bible! How could Joseph Smith write in chiasmus if he did not know it even existed.
The Spaulding manuscript, that Joseph is said to have plagiarized, was written, but not published , 20 years before the Book of Mormon was published. The manuscript was in Conneaut, Ohio, Joseph was in Palmyra, New York. The manuscript was eventually published in 1885, long after the Book of Mormon had been written and published. Joseph had no way of knowing about this manuscript, considering the distances involved and the fact he did not know Solomon Spaulding. bears no relationship to the Book of Mormon in either style or content. It is written in modern English and is only about one-sixth the length of the Book of Mormon. The story commences with a group of Romans during the reign of Constantine who were blown off course on their way to Britain and landed in America. In this novel one of the Romans served as the narrator of what the group observed. The major part of the chronicle is the description of two Indian nations who have the Ohio River as a common border. A romance between a prince of one nation and a princess of the other leads to a great war between the two groups which is described in some detail.
If the Church were a cult, it would have fallen apart and disbanded when Joseph Smith and his brother Hyrum were murdered in Carthage, IL. Instead, we are a recognized religion with over 13 million members all around the world.
Edit:
Joseph Smith was 15 when he had the First Vision.
He was 18 when he was visited by Moroni and learned of the Gold Plates.
At age 22 Joseph received the Gold Plates and began the work of translation.