I was raised as an Anglican but stopped attending sunday school and church when I was about 10, but still believed in God. Around 28 years old I began to wonder if you could find the real God if you looked closely at Islam, Hinduism, Buddhism etc and bought a book called What Man Believes that examined all the major religions. JWs came to my door and raised the prospect of living forever -- it seemed reasonable that that was God's original purpose. I swallowed the selective scriptures the JWs provided.
It was 1985 and I was scared of nuclear war and I was reassured by the JWs' claim that God would never allow man to destroy the earth. I was also greatly persuaded by the "fact" that only JWs used "God's name" and that they alone were sharing the "good news".
Yup, I swallowed the lot. It was only later, reading books by Ray Franz and others, that I realised how easily those seemingly rock-solid reasonings could be refuted, or at least challenged with equally convincing arguments. Which is why, of course, the JWs warned (and still warn) against reading writings of "apostates": they want their people to hear only one side of the argument.