The BBC is carrying this.
Pilots 'raised Boeing safety fears' months before Ethiopia crash
In a closed door meeting with Boeing executives last November, which was secretly recorded, American Airlines' pilots can be heard expressing concerns about the safety of MCAS.
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The pilots also complained they had not been told about MCAS, which was new to the 737 Max, until after the Lion Air crash off Indonesia, which killed 189.
"These guys didn't even know the damn system was on the airplane, nor did anybody else," said Mike Michaelis, head of safety for the pilots' union.
Link
Ironically, it appears AA pilots were the most informed on this issue, and AA purchased both offered safety “options” (Angle of Attack sensor display and disagree indication).
Also, the article has a good illustration on the issue.