Friends I am using this kent Grand from 3 years.Friends this Ro system is awesome in every field.It gives us all the benificial and essential minerals present in water.It has a three layer water purifier process.It has one filter outside which cleans the tank water and has a carbon filter, sediment filter, and a Ro inside the machine.It makes the water sweet in taste.Friends but the major cons of this Ro system is its all all filters get blocked within one year and a customer has to change all filters.Friends but I will recommand you to buy this model as it is good value for money and kent also provide free service for one year after which a customer has to take a membership of Rs 4000