I know some Mormons. The ones I know are nice people but it's most definitely a cult in my eyes.
The history of the church is very interesting though. The founder of the church, Joseph Smith, was a known and convicted scam artist, who married a 14 year old girl, amongst his other ~40 wives.
They also believe in "continuous revelation", this means that members of the church are still recieving messages from god. This gives them a convenient out whenever they're getting too much bad publicity because the new messages can overrule the old ones. Like when they were going to be kicked out of Utah for practicing polygamy and the leader suddenly receives a message from god saying "no, actually polygamy is wrong and forbidden." Or, in more recent history, when God decided that actually black people can join the church.
This is all on a hierarchy too so the head of the Mormon church, who is always about 90, receives messages for the whole church. Leaders of churches receive messages for their individual church. Men can receive messages for their own family and, obviously, women are at the bottom and can only receive messages for themselves or their children.