Heats up very quickly. When you turn on the hot water, it is likely to have the room temperature, for example 22°. Within a few seconds, it increases, depending on the flow, up to 60° (if the flow is low). With a normal flow for dishwashing, it easily reaches 37-40°.
I changed the nozzle because the one it comes with is a shower-style with holes and it splashes. I replaced it with one that can be rotated for a smooth flow or a shower flow, and it works much better.
It runs more in the cold, meaning it provides the normal flow that a regular faucet has, while in the hot water, the flow decreases. Even at maximum, it is about half of the cold water flow. But I don't think it's a problem, the flow is sufficient for dishwashing.
The installation is simple when it comes to plumbing, it requires a 1/2-inch connection. However, when it comes to electricity, it requires careful installation. It should be done by someone who knows what they're doing because it draws a significant amount of power and requires proper supply, grounding, and of course, a relay in the house for safety.
It unscrews from both sides. One side has the electronics, so there's no reason to open it. The other side opens the water container for cleaning if it collects salt in the future.
I installed it in the sink as a second faucet because I'm afraid it's not a good idea to use it for drinking water. The instructions say to let cold water run after using hot water, probably to remove the hot water from the tank, but I don't know if it's enough to make it safe for drinking.
Another thing that seemed a bit strange to me until I got used to it is that the handle only moves right (cold) - left (hot), but it doesn't move up and down like regular faucets. The flow shuts off when you put it in the middle. It's just a matter of getting used to it.
Overall, it's very good for its price, and we'll see if it has any problems in the future and what kind.