Sharing one year review of Viomi S9. Hope it may be useful to others.
The vacuum has been working well for the last one year. However, last month while cleaning one of the rooms, the vacuum died suddenly. It won't start, charge or connect to my phone. So, I raised the complaint by calling Cambium Retail who is responsible for the RMA. Their engineer called me and asked me to share a video, explaining the issue. After I shared the video, they asked me to deposit the device at their center in Nehru Place. I obliged to their request and deposited the device. After 4 days, I got a call back that the device has been repaired and they have replaced the battery.
I got the device back and started using again. Then, another issue cropped up. The device stopped dispensing water during the mopping function, even at the max settings. So, I called them again and shared a video. They informed me that they will be sending a replacement tank. Their assumption was that the pump in the tank had died. Initially they had committed to deliver the replacement tank within a week but they took 3 weeks to deliver the replacement.
The device is back in action and working well like before. Overall, I would say that the RMA process has been hassle-free except for the delay in replacement pump. Now, the device is out of warranty. Fingers crossed for any future issues.