The Sense HAT (B) is specially designed for Raspberry Pi, integrates multi powerful sensors such as gyroscope, accelerometer, magnetometer, barometer, temperature and humidity sensor, etc. It is communicated via I2C interface, and allows to connect more external sensors if you need.
Trying to make the Pi become a robot that can detect movement and orientation? Or using the Pi to collect environmental temperature, humidity, and barometric pressure data? This HAT would be your ideal choice.