Probably the biggest con of of using level lines is that they need to be stretched to remove the coil set from them before they will fish properly. Actually the coil set can be removed with no stretching involved at all.
Un-coil or un-spool the Line and grasp one end of the line with your left hand near your left shoulder and the line running behind your neck with your right hand an arm length down as far as it will go. Alternately pull the line back and forth across the back of your neck (this works out best with a collard shirt) for 12 to 20 repetitions, or until you feel substantial heat on the back of your neck. At that point, the treated line section will lay nice and straight.
Continue treating the line as before in overlapping arm-length, length sections, until the whole line is treated and nice and straight. If it is convenient and you have a comfortable place to sit, you can alternately run the line over the tops of your legs. Give this technique a try and see if it is a lot easier than standing around waiting for the coil-set to be stretched out of your level lines by pulling on it to stretch the line.