The disadvantages are that it takes longer to get in position and you must be careful not to step out of the batters box or worse on the plate. Whether you square-around or pivot, you want to make sure you are in a comfortable and athletic position to bunt the ball. Your knees should be bent and your bat should be held out in front of your body. The barrel of the bat should be at the same height as your eyes and at the top of the strike zone. As the ball approaches use your knees to adjust to the height of the pitch.
Many people believe it's difficult to bunt a high pitch.
In actuality, the opposite is true. If you remember not to bunt any ball that is higher than the bat, then you are in great position to bunt the high strike. The lower pitch on the other hand requires you to drop down to be able to bunt it. To keep the barrel of the bat higher than the grip of the bat, you must use your knees to adjust to the low pitch. Never drop the bat head to bunt the ball.