They work well. They cost more than other options, but (at least in my experience) colours are more consistent and uniform.
Not sure if it's still the case, but the ones I have from a few years ago use Zigbee so you don't actually need their hub - any Zigbee coordinator will do (I'm using a PoE one, the smlight SLZB-06).
Consider using smart switches instead of smart bulbs. However, given how old the house is, you might not have neutral wires at the switches, which limits the types of smart switches you can use. Do you know if the electrical wiring is still original, or if it was redone at some point?
For the power outlets, I'd highly recommend getting an electrican to install more. It's way more convenient than having power strips everywhere.