Perfect fit for my Mont Blanc pen, maybe slightly less writing time than original, but good value for the money.I used this to refill a Mont Blanc ballpoint pen and I love the way it writes so smoothly. It’s a nice shade of blue.Reasonably priced refill for my Montblanc Ballpoint. It was the blue/black they call the color. Essentially though it's just blue. Next time I'm going to purchase the medium point black. Just like black ink better. My broad point Montblanc brand seem to glob up and ooze ink so I switched for now to this brand to try.First of all, this alternative Mont Blanc ballpoint refill is a perfect fit for the pen. Second, it is a blue-black or really a dark blue color. At one time Mont Blanc made a dark blue ballpoint refill but currently the blue ballpoint is a pale blue that I don't like at all. This is a nice dark blue and the only choice out there if that is your preference. It is an expensive pen, after all, and I should have choices of ballpoint colors. Otherwise I might as well write with a cheap pen. Third, the ink flow is very smooth. This is a low viscosity ballpoint ink, meaning that it writes like a ballpoint - not like a gel or liquid ink - but with much less pressure and effort than an old fashioned ballpoint, which is all that Mont Blanc makes. This is a much, much nicer writing experience. And fourth, these refills are cheaper than the Mont Blancs. I guess if you spend what a Mont Blanc costs the price of a refill is not crucial, but hey, cheaper is better anyway. I have had no problems - certainly no leaking, globbing or skipping, and I am very picky about my pens and writing. This refill is sure to please. The black Monteverde refill is just as good, I've used them too, if black ink is your thing. I just really like the blue-black. It is classy.works great in my original penI've ordered this refill for my monteblanc pen 2x, and I'm about to order it again. It writes beautifully and the ink is never messy. Why pay the price for a MB refill when you can have just as good, if not better with the Monte Verde.These are a good, but not truly great, substitute for the outrageously expensive Mont Blanc refills.The refill is about as good as a Mont Blanc, which is to say okay. It is not particularly smooth, and is a fairly fine point. It got my pen back up and writing again, but I will still use my Cross pens for anything that requires more than a signature.these ran out after one letter absolutely rubbish you should be very embarrassed passing of as Montblanc style alternativeI bought one of these for my Mont Blanc ball point. It lasted 10-days. My MB original lasted over a year. Don't be fobbed off buy the real thing it's worth it in the long runReasonable quality, but the inks a little faint and scratchy to write with. Will buy genuine Mont Blanc in future.Elegí Amazón porque no tenían el producto (repuesto de cartucho de tinta para boligrafo Montblanc) en los establecimientos del ramo, y tampoco me aseguraban poder servírmelo. Solo lo tenían en las tiendas de Montblanc, siendo el producto carísimo y a mi entender un "abuso de marca" Montblanc, con un precio desorbitado en comparación con productos similares a él y de calidad. Me ha gustado el producto pues aun siendo una marca distinta (Monteverde) a la original (Montblanc), ha cumplido todas mis expectativas, incluso las económicas, pues hasta ahora, en Amazón he pagado el precio más económico desde los 9 años que llevo utilizando el producto, el cual he venido comprando en distintos establecimientos que lo tenían. El producto es idéntico en tamaño, forma y material al original de Montblanc, y ajusta perfectamente en el espacio que tiene destinado. El color de la tinta que contiene es el esperado , también al escribir no gotea la tinta ya que su densidad y ajuste de la bolita de la punta de escritura son los adecuados. La duración de la tinta es similar a la del original, y el color que deja en la escritura no cambia con el tiempo. Por tanto, por todo lo descrito, cuando tenga que reponer el producto, no dudaré en volver a pedirlo a Amazón, así como también lo recomendaré a las personas que tengan la misma necesidad.Primero opté por comprar el original, pero cuando vi el precio me dio un sobresalto. Buceando por Amazon descubrí esta marca y me arriesgue a probar por los buenos comentarios.Creo que ha sido una compra excelente, personalmente me gusta mas que el recambio original que llevaba mi Montblanc, tengo la sensación que la tinta desliza mejor, pero se seca rápido y no deja rastro si pasas el dedo por encima.