I bought in exchange with my previous normal Zero b RO but now suffering with this new product. While delivering it they provided me defective piece and later when I started facing problem like sensor unfunction, water overflow, LEDs indication wrong, adapter problem, etc. Three times they came and tried to fix like patches almost every part has been replaced but still I am facing same issue. Like this they spend 5 months and I am still suffering. Now they are not ready to replace the product with statement that company gives warranty not guarantee. Their behavior also changed.