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The very first time I used these highlighters the nib of one of them broke completely off, rendering it useless and confined to the bin. Some of the colours are very similar - there are two sort of pinky colours, very easy to confuse if you're trying to highlight different characters in a play, and there are two blue/green colours - different, but too similar for quick identification.
I was delighted with my pack as it contained a brown marker which seems difficult to get but like the other reviews with photos with very light use one nib broke off right away and so I returned them and got a refund. Shame. Have used highlighters for many years and never had any problems with other makes.
Really like the colours and was happy when they arrived. But I’ve now been using them for a couple weeks and some of them are already running dry! I do highlight a lot as part of my postgrad degree but I didn’t have the same problem with the Stabilo Boss highlighters; they lasted a lot longer with the same amount of use... But still nice highlighters and good value for money just not great longevity.