The condition after one year. The line is still there. The stove on the left side is hardly used. Most of the time I use the right side because of the smaller ring for smaller pots and also its has the high button which I used to get the cooking pan heat up faster.
The problem is water will stain the stove into white patches. Especially if the bottom of the pot is wet, it will create a white stain onto the stove or sometime when cooking water splash onto the stove. So to clean these white patches, I have no other choice but to use the green scouring pad.....and according to Vees Marketing, the stove is scratch proof. Unfortunately its not. If you look closely, there is already plenty of scratches from the scouring pad.
In my experience after one year use, the stove has so far not created any problem. I guess the heating capacity is still the same without any loss in the heating ability. Cooking wise, as good as using gas. Most convenient is toasting bread on the stove. Very fast but if you are not careful then you will end up with burnt toast.