A small but important point of criticism, and therefore only 4 stars: NEVER MORE THAN 1000W lead changes! It may well be that the internally built relays can switch up to 16A, but the supply of 3x0,75mm² is absolutely not built for such heavy loads! So either change product description, or obstruct other cables.
Otherwise, as already written, really great. With me so 2 heat lamps are switched for our large rabbit-year-stall in the garden.