Arrow50t

Based on the information that is available at this point I would say the 737 Max is safe. The preliminary report on Lion Air Flight 610 states that the previous crew dealt with the same failures and handled them according to the way every 737 pilot is trained: Airspeed unreliabe and runaway stabilzer memory items:

The PIC cross checked both PFDs with the standby instrument and determined that the left PFD had the problem. The flight was handled by the SIC.

The PIC noticed that as soon the SIC stopped trim input, the aircraft was automatically trimming aircraft nose down (AND). After three automatic AND trim occurrences, the SIC commented that the control column was too heavy to hold back. The PIC moved the STAB TRIM switches to CUT OUT.

An interesting fact is that the crew suspected the runaway stabilzer was caused by the speed trim system since they did not know about the existence of MCAS. The Pic wrote in the Tech log:

STS* also running to the wrong direction, suspected because of speed difference


This shows that even though the crew wasn't aware of the MCAS system they still knew how to handle it malfunctioning, which makes sense to me since it doesn't matter what causes a stab trim runway it just matters to stop it from happening (nonetheless I share the criticism that Boeing should have made crews aware of the system).
I would hate to have unreliable airspeed coupled with trim runaway but the Lion Air 610 crew was in the air for more than 10 Minutes which seems like enough time to to set the stab trim cut out switches to cut out.

As opposed to the way the media is reporting it, the MCAS System isn't going to be active in a normal flight. It is a system that will aid in a critical situation which under normal circumstances will not occur. If a system that is designed to aid the pilots malfunctions it is our job to recognize this and shut off the system. This I believe is not going to change anytime soon.
Nonetheless I do agree that it would be an improvement if MCAS received information from both AOA sensors.

About the reports that several pilots already faced problems with the MCAS system as was spread by news media througout the world. Looking at the reports the Dallas morning news refered to, they misinterpreted the reports. There is one report about the autopilot behaving unusual after it was engaged. There were two reports made about this one incident: one by the Captain and one by the First Officer. The media falsely reported this as two seperate events. Furthermore, according to our present knowledge MCAS will not be activated when the AP is engaged and the crew even wrote that they cannot rule out a mismanagement of the AP. The other reports about not setting FL 360 when cleared to this level or the thrust not being set as expected are the kind of reports that you will find plenty of for any given airplane.
So we are left with no report concerning a malfunctioning MCAS experienced by US pilots which is the opposite of what the media reported (one pilot rightly complained about the lack of documentation for MCAS).
Considering that we do not know yet what caused the Ethiopian crash and that the information about the Lion Air crash suggests that it was preventable, I find the grounding of the 737 Max unjustified and believe the airplane is safe to fly.