“If you want IMU sensors on a teensy 3.1 or 3.2, this is the easiest way to do it. It makes a tidy stacking package, it's the IMU chips Adafruit describe as "two of the best motion sensors we've tested" (they are on Adafruit's https://www.adafruit.com/product/3463) and there's a library ready to go at https://github.com/PaulStoffregen/NXPMotionSense.”