Advantages

Accelerometers have faster response and settling than traditional liquid tilt sensors, up to 100hz response

No "slosh" or leaking problems associated with liquid tilt sensors

Sensor + Signal conditioning on a single chip in an IC form factor

Disadvantages

Acceleration signals may interfere with tilt signal (problem for all tilt sensors)

Currently available low cost devices difficult to use for sub 1 degree resolution (except for very low speed applications)