I bought this grinder in one week before, this is working so nice with soundless. The product quality is so good. It’s taking less than 20 mins for 1kg grinding. Remember 1thing when you use if for the first time, grind something like wet rice so that the smell of stone and some powder from the stone gets washed away completely. The cost is little high but worthy saves a lot of time. I would really happy to share a positive review of my Grinder.