I tried four of these refills and each one had the same problem: terrible skipping. The refill skips mainly when I write lower case letters, ie tight little circular shapes. When laying down long straight lines, no problem. Anyway, these refills are useless.Monteverde also makes a line of refills that they call "Soft Roll" and these are excellent. I have more than ten of these and they all work well. It is a shame that there is not a "Soft Roll" refill that fits Cross rollerball pens.