Take the level off and nobody has to worry about it.
For serious 3D, maybe its necessary but for hunting its almost worthless.
I disagree with this comment cougar. 2nd and 3rd axis is vital if you strive to be as accurate as you possibly can.
It takes 20 minutes to set them both and having them set correctly does increase shot accuracy as long as you use good repetitive form and hold your bow plumb according to your level vile from your axis adjustments.
I don't even have to look at my level vile to know thatthe bowis plumb. The feeling is imbedded into my shot sequence from repetition.
By checking the vile each shot in practice it becomes second nature to hold your bow plumbjust like hitting your anchor points.
The only way it would be worthless is if one does not want to put in the time to become the best shot they possibly can.