That's a great question Believer, do JWs really have the truth? I recommend you research information outside of the JWs to truly decide for yourself. You would not buy a car from an auto dealer unless you did all the research both good and bad. Why would you take the JWs info at face value in choosing a faith? I recommend a book called "Combatting Cult Mind Control" by Steven Hassan. He never was a JW, so not to worry he is not apostate. However, this book helps people identify what a cult is, and then you will have the tools you need to decide if the JWs stack up to all their own hype or if they really are a cult as millions of people claim.
There is a wealth of information that can help you gain a stronger grasp on JWs that you cannot find from them. Again, its kind of like shopping for a car in that no car dealership is going to tell you how bad their vehicles are, how many times they have been recalled, or how many people have died due to faulty vehicle manufacturing.
Also, it is easy to poo-poo others concerns over the JWs because JWs routinely train their members in the art of something called "overcoming objections" where common objections are dismissed with a common answer. While it can be an effective marketing tool, it does little to address real problems that people experience with the org. It's kind of like if you asked a car salesman about the recalls on the vehicle he is selling and instead of addressing the question honestly, he/she tells you their company is the only car company produced worldwide and with a certain saftey accolade.
In response to your reply to me about JWs being the only ones globally preaching, again you are mistaken. That would be the Catholics who are in more countries than you know. And, the preaching work wasn't the command that Christ gave to his followers. He expressed his command very clearly by saying "This is my command: Love one another" in the book of John Chapter 15. Read the whole chapter, not just one verse as the JWs do.
Finally, this will be my last response to you as I sense you are only on this website to stir the pot. All the best to you, and good luck in your search for real truth.