Grove - 3-Axis Digital Accelerometer(±400g) reading

Can anybody tell me, does the library that supports this board, read stable readings from the sensor, when it is just sitting still ?
Or does some routine need to be developed to do this ?

Another companies device said that the best mechanisn for their device was to set a bias reading, and then compare the results, i could never get that to read and adjust correctly.

I bought this sensor to see if it acts differently.