One of the problems with regard to experiences is that the Society are often very specific in their instructions to the speaker eg "interview a brother or sister who came into the truth as a result of a witness from a workmate" or "ask a pioneer to relate encouraging experiences he / she enjoyed from the recent tract campaign".
In many cases it was impossible to find such an experience , so you are left with trying to shoehorn often virtually fictional experiences into the item. To make matters worse , the more humble JWs tend to be quite reticent about appearing , so often it is the more boastful "look how Jehovah has blessed me" types that come forward and usually these are quite willing to "amend" the experience somewhat , to put it mildly.
I recall one assembly when a young sister from my own congregation was being interviewed , much to my amazement. This was a sister who had several times been reproved for immorality and was a constant troublemaker but was portraying herself as a zealous spiritual giant and the most chaste virgin imaginable. It was the talk of the congregation afterward and many were astonished that she was being held up as an example.