The problem with smart switches. If the power goes out and then comes on, the lights stay on. So if you're away and eskom cuts your power, the power switch will remain on. Slight flaw there.
The TP Link ones work nice. We use their cameras too, but we prefer just normal switches and smart bulbs. Work easier.
But with Eskom, even thats effort. So we have switched all to rechargeable bulbs. They last 3-4 hours when eskom cuts. Our neighbour still cant figure out how all our lights work when their power are out. I know they have been peeking if we have solar panels which we dont have yet.