I have just purchased a Preciso and I would say I like the grind quality and speed better than the K3 touch or Mazzer mini,
They are a more compact unit but not as solid as the K3 or Mazzer but for low volume home use should be suitable,
You can buy replacement parts at fairly low cost if needed
Low grind retention is also good
I purchased it for my wife to use as she was not happy using the Mini with the doser where as I use a Pharos hand grinder,
I have been using the Preciso myself and like the results I think its a great grinder for the price.