I have an old copy of Finney's Systematic Theology, which is some pretty tough reading. My copy however is full of notes and underlining because I found my way to loving God through his ministry.
Much easier reading covering all his major points, is Helen Wessel's edit of the original autobiography, still available cheap at Amazon.
Finney's ministry secured the salvation of an estimated 500,000 people, and it is said that the retention rate for his converts was around 80%. Compared to modern figures of around 5% or less, it behooves any wise person to take a closer look at the man and his ministry before dismissing him as some kind of nut.
In addition to defining all the words we bandy about in our theological discoursing, his main theme was man's personal obligation to seek God. Prevailing theology of the day was that salvation was only initiated by God for His elect, and it was not the place of totally sinful man to presume he could be saved without first getting a call from God.
Finney argued that it was the obligation of every man to reach out to God in repentance and to get saved- lambasting the idea that God had pre-selected only a few to save, and had condemned the rest. When he preached this, proving God's call to men from the Bible, thousands came running for the altar to be saved. As you might expect, this angered the clergy of the other persuasions and the stamp of heresy was placed on him.
He did not lie to obtain his ordination as a Presbyterian minister, he just refused to accept the tenets of limited election and destroyed the logic of the committee members who had come to examine him and confirm the ordination. Really, it was a dramatic moment in time as described in the autobiography, and the ordination was given. And enemies were made...
Few men in history operated in the power of the Holy Spirit like Charles Finney.
Read the works, then draw any conclusions.