I never was a JW. I was brought up in a fairly fundie sect (PB) and have been for many years an interested atheist. I am an admirer of the work of Bart Ehrman (and recommend his blog).
From time to time, JWs call at my door and invite me to partake in a 'Bible Study'. I always enthusiastically accept. (This is an area in which I am interested, and am contemplating (even at my advanced age) going to university full-time to follow a degree course).
Ehrman describes how he does a 'pop quiz' of his undergrad students on their first day. Nothing complicated, very basic stuff. I use some of his questions when a JW at my door invites me to a 'Bible Study',
Such as: How many books in the NT? In what language were they written? What was Paul's last name? Or Jesus' last name? What language did Jesus speak? And so on and so on.
Shockingly (or not) not one of the JWs inviting me to join in a 'Bible Study' has been able to answer or discuss even the most basic issues, let alone stuff like the schism with Orthodox churches etc.
'Bible Study' it most certainly is not.