These markers are low-quality. Straight out of the package they write like an Expo that is running low on ink. Also the chisel tips are very hard so they feel awkward when you are writing. On a positive note they do erase well. Next time I will certainly pay more for a quality brand.
These markers are great on white boards vs. the market leader and offer a good value. They also seem to stay moist and useful for a longer time than the big guy's product.