Like others, I have had difficult experiences with Martmeodena, which I have previously chronicled. When they were just selling Delta pens, I found them to be as attractive as ever, but of less than perfect quality. I am not aware of any involvement by Aurora, and, as to Visconti, their customer issues stand on their own. If Martmodena has compounded their problems, yet another reason to avoid these people.
I have long admired the beauty of many Italian pen makers and am certain that most manufacturers and dealers are completely reputable. There are, it seems, some who are not.
My reaction has been to avoid Martemodena, Delta and Visconti completely. It is ironic, because, some while back, I wrote a very favorable article about Visconti. Issues with things like getting the desired nib drove me, first, to email Dante del Vecchio - whose reaction was why was I bothering him. Then, I sold off my Viscontis, save one very early ballpoint. BTW, Signor del Vecchio is now designing another line (too?) - see the Fahrney's catalogue. I have also sold all my Deltas, save one ballpoint.
My reactions reflect my mistrust, and I would not suggest that anyone copy them. I would strongly suggest, however, that before making any purchases from these people that you are securely backstopped so that you can withdraw easily and quickly.
Fultz used to wish us "good hunting." Especially true here, I think.