I know this for many years (I bought the first at the time of francs! I always have if she had not had an unfortunate accident). It is clear that the quality has not changed when the price, it was a pleasant surprise! I highly recommend this product, more no problem finding spare knives when they no longer intersect, it's a good monitoring product. I specify that I still use it for family use, so I ignore if it meets both for professional use.