I have come to believe that what is important in a religion is not necessarily doctrine, but whether that religion meets the spiritual needs of the people. You could argue the trinity all day, but what good does it do to find a religion that teaches the correct (in your mind) teaching, if it doesn't meet your needs and treats you poorly? That is what the JWs are to me, a religion that completely fails in supporting it's members. I was a member for thirty years, trust me when I say that they are not good to their people.
They put way too much emphasis on meeting a set of strict and rigid requirements and far too little emphasis on shepherding and supporting the individual. People are often disfellowshiped and shunned for simple human mistakes, even one time mistakes, even when they do express repentance. Their interpretation of the bible may hit the mark in a few areas, but they also add a lot of questionable beliefs as well, things that are not supported by the bible or are a twisting of the intent.
They also have incorrectly predicted the end of the world many times, each time claiming that they had special knowledge, and then each time later pretending that they had done no such thing. When I was young they claimed someone my age would have no time for a career in this system of things. I am almost 62, and it saddens me that they are still giving young people this bad advice. The bible has a name for people that do this, they are called false prophets.