I only gave this markers a one, because I could not give them a zero. I found them to be unusable and call CBD and told them so. The crayon inside the markers would not stay out so I could use them, and they did not mark at all.
Had ordered highlighters before and was very satisfied with them. They were the ones with a clear barrel and an insert showing the highlighter color. This order was apparently from another vendor, with a solid barrel and colored tips. The "leads" were the same, but they would not stay extended under use. A second order, quickly and graciously shipped by CBD, were just as unusable.
I have to agree with some of the other reviews that the spring does not hold if you push just a bit too hard. I have a previous version of the dry highlighters and its quality is better. Also the yellow color is not as bright as the previous pen I have. I thought I give these highlighters a try but I will not buy again this brand again. I don't think they bleed through since they are like crayons and since you cannot push too hard or the spring will retract it won't tear my bibles. Maybe if you have a paper thin bible.