I only gave it 3 stars as it's the average of 5 stars for the lights and set up. But, only one star for the app. I can only hope that Philips will improve the app over time. And, as new as it is....I'm sure they will. They will just need more feedback from real life users. In time, I'm sure I'll be able to give it 5 stars. Improve the UI. Organize the app by page....each page will be a different room/light. The opening page will be an "all lights" control. Then, organize each successive page by the user as to rooms or collections of lights. I've had this kit all of 2 hours....so, this review is based on my limited experiences as of today only.