Well the advantage of a fuel cell is the weight displacement in the car.Also I think its alot cleaner from the start not having to fight rust in the fuel system.Besides those things there is nothing else That I can think of .But as for bad ,the only danger is someone rearending you and busting the fuel cell all over the front of the car.SO get ready to buy a splash sheild somewhere in the car so the fuel does not go on you!