How long were you in?
How much money would you estimate you spent on Scientology materials, fees, etc.? If you're not comfortable answering, that's okay.
What prompted you to leave?
I was in about 10 years.
I spent in the low $10's of thousands.
Let me dig up the answer I just gave on another thread so I don't have to retype...
Although there were a number of things worth doing early on, as I got deeper into it it started heading in directions I found to be contrary to my personal goals, and ironically in conflict with first principles of scientology and dianetics.
One of those principles was that you had the PC (client) run only those incidents that they themselves brought up. In the upper levels the client is given very specific incidents to run, these were said to be common to every case. They aren't.
IMHO, All levels OTIII and above are actively dangerous, as they involve waking up traumatized bits of awareness (body thetans) and kicking them out of the body in an awake and psychotic state.
The organization itself became increasingly dysfunctional (or I became increasingly aware of the dysfunction).
At the time I left in the early 1980's a lager number of people had reached the same conclusions and were leaving in droves.
My personal breaking point was when a policy letter called 'Jokers and Degraders' came out. This said that people who made jokes about scientology were the enemy. If you've been following my posts for any length of time you know it was only a matter of time before I ran afoul of that!
Also, scientology started increasing its' costs of services.
Only a little.
Just 10%.
A month...
That was a glaring conflict with the goal of 'clearing the planet' and indicated that they were shifting focus from eliminating the effects of the reactive mind, and concentrating on making money.
About the time I left L. Ron Hubbard died, under circumstances that suggested to me that he might have been murdered.