One of the most well-respected and loved preachers of the 20th and 21st century. His teachings, from what I've encountered, are entirely based upon Scripture (which, by the way, only supports salvation based upon faith in Christ's sacrifice rather than works; we can't work our way into eternal life). A secure site and it has some great info on it.
There is questionable content on this site. It promotes the idea of "sola fide" or "salvation by faith alone" which is clearly false. It also promotes "eternal security" which is also clearly false. Both of these ideas are false and refuted clearly in the Bible and in Sacred Tradition.