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I bought these pens a while ago for my classroom. Thinking they were OK I left them in my cupboard. When we started using them recently, I noticed that 5 of the fat pens's nibs were broken and the highlighter became unusable. My advice is when you receive them, check every single one of them. Unfortunately, I was too late to return or get a replacement.
I bought these to go in my fifth grade classroom. Although these highlighters were being used by 52 fifth grade students constantly, they didn't hold up very well. The tip of the highlighters kept falling off. While I understand we use highlighters regularly, this wasn't normal wear and tear, and my students were not being rough on them. They're just cheap highlighters. Nevertheless, it's a great amount of highlighters for the price. I just wish they didn't go as quickly.