Jehovah's Witnesses believe their salvation is not assured. It is not guaranteed. It is not permanent.
They believe they will be saved only if they do enough for Jehovah before the final day of armageddon.
The truth is hidden. Witnesses don't know they can have a permanent place in God's kingdom without working for the organization. John 8:34-36;
JW's don't understand that we're not saved by our own righteousness or our religious affiliation or how hard we work for the Watchtower. We are saved by God's Grace.
The Bible says we can 'inherit' eternal life by doing 3 simple things. In other words eternal life is a free gift. It is inherited, - not earned.
The Bible says this. "Teacher," he asked, "what must I do to inherit eternal life?" "What is written in the Law?" he replied. "How do you read it?" He answered: "'Love the Lord your God with all your heart and with all your soul and with all your strength and with all your mind'; and, 'Love your neighbor as yourself.'" "You have answered correctly," Jesus replied. "Do this and you will live." Luke 10:25-28
Jehovah's Witnesses are dependent upon the organization for knowledge that leads to eternal life. Instead of using the Bible as their main textbook, and their literature as a reference, it's just the opposite.
The organization keeps JW's very busy with several meetings every week, going door to door, attending conventions and assemblies, preparing talks and sermons, preparing for meetings so they can answer questions correctly based on what the latest Watchtower literature says is 'the truth'.
The Watchtower says this about eternal life, ''Through the congregation, Jehovah has provided an abundance of spiritual food. You received the truth that set you free from religious error and spiritual darkness. (John 8:32) At congregation meetings, assemblies, and conventions arranged by “the faithful and discreet slave,” you obtained knowledge that will lead to everlasting life on a paradise earth without pain and suffering.' Watchtower July 15, 2009, Article: 'Accept Gratefully - Give Wholeheartedly'. 
In the Jehovah's Witness faith, strict rules must be followed in order to earn everlasting life in God's Kingdom. The rules are written down by the organization.  There's no discussion. JW's are expected to put on a happy face, be completely submissive, and obey even when they have nagging doubts. 
If everyone had access to information Elders have, someone might notice that they are not free to disagree or exercise their own conscience based on how God leads them.
When there's a disagreement between what God says to a Jehovah's Witness and what the organization says, obedience to the organization comes first. Obedience to God comes second.
Because they believe the organization is God's channel of communication, they trust the organization completely. Not doing so would be virtually the same as disobeying the commands of God.  The organization has unwittingly become a symbol for salvation.  Thus freedom to worship God without interference is an illusion.
Sadly Jehovah's Witnesses must obey the organization and do what they're told or face the consequences. Judicial committees within every congregation are on a mission to keep the organization 'clean'. 
Ironically in their effort to be the cleanest, most righteous, and most worthy Christian religion, they have removed themselves farther away from the teachings of Christ. Luke 6:27-41; Luke 18:14; 2 John 1:9
1. Shepherd the Flock of God. 2010 Elder's manual
3. The organization of Jehovah's Witnesses has become a symbol for salvation. Watchtower Sept 1989 However putting any human or any human organization ahead of God is not allowed in the Jehovah Witness faith. Thus we have a contradiction. The Watchtower says that 'Salvation is not to be ascribed to human institutions or their symbols.' WT Sept 15, 2002, article 'Salvation Belongs to Jehovah'.
4. The Watchtower says, 'Today, the Governing Body represents the faithful and discreet slave class. There was a similar arrangement in the first century'. Watchtower June 15, 2009. Article: 'The Faithful Steward and Its Governing Body'.
Jehovah's Witnesses believe they will live forever on a paradise earth