We've got a few machines on site with the new mpu6. They are alot better than mpu5 in the aspect that it tells you the problem rather than displaying it with the red/green light method.
Although as they are new when you get a problem it's not so easily fixed.
A tip for anyone with an mpu6 is that if the internal battery goes you cannot replace as i found out the hard way and am now waiting for a new flashed mpu6.