The negative thing I see is with the founder, Joseph Smith. He doesn't sound very promising and the fact that he states God AND Jesus approached him in the woods sounds incredible. If I remember correctly, it was the angel Moroni that told him where the "Golden Tablets" were, which were buried on top of a hill in New York. How did it get there? According to Mormon teachings, Israelites were the first to inhabit the Americas, when God had placed them there after the Tower of Babel event. The Israelites lost the tablets and so christianity was lost along with it. The native indians of today are descendants of those Israelites.
It gets better.
Mormonism teaches that God is not the only deity and that we all have the potential of becoming gods. God, according to Mormons, is not just Spirit but has "a body of flesh and bones as tangible as a man's." They teach, "As we are, he was. As he is, we shall become." There has been constant revision of Mormon doctrine over the years, as church leaders have changed their minds on a number of subjects including polygamy, which was once sanctioned by the church.