Pros:
1) Good quality water(I am hoping. I have no way to test)
2) Customer Service(Ever ready to take your order, prompt service)
Cons:
1) Very high cost of maintenance(GKK-2 is Rs. 3, 500| GKK-1 is Rs. 1, 990| SF Filter is Rs. 250. You will have to change all of these at least once- SF at least twice - every year) [Add Rs. 250 service charges for each change]
It has been just over a year and I have already spent more than the cost of the unit. Carefully weigh in your costs and benefits before buying.