I'm sure most, if not all of us, would agree that we did have good experiences while we were JWs.
But those were in spite of being in a cult, not because of it.
Also, many, if not all, of those experiences can be had outside of JW-land.
For example, I gained experience in public speaking and realized that I enjoyed teaching as a result of being an elder and conducting the TMS for over a decade. This encouraged be to get a BA and a teaching credential.
This was something I wanted to do BEFORE I became a JW but put aside for the obvious reasons.
It should also be obvious that most teachers do this without ever being a JW. Also, as you no doubt know, getting any kind of higher education is strongly discouraged by the WT leaders. I received a lot of flak as a result, from fellow elders and even my wife at the time.
So really, the best thing I got from being in this religion was affirmation that I should never have joined it in the first place. The next best thing I got was out.
The short answer to your question the in: No.
