I have a ton of Kasa. Local polling, but since it's more for on/off, I don't care about a 5s poll. I had to buy about ~30 light switches for my house, and using Kasa saved thousands over Lutron.

Smart Plugs, sensors, etc: Ikea is amazing. You need to buy a hub, but then accessories are 3x cheaper. Their plugs are $9 and have energy monitoring which is amazing. They have water leak sensors for $12. Incredible value.