"This 4 port smart hub really gets the job done. I use the powered up app on a daily basis and when i connect this hub to the app i will just start by saying that it connects really fast. The batteries last a long time (rechargeable or non- rechargeable). I have made many creations using this hub like an automated traffic light system. Or a train crossing system. This hub is very useful for many projects. Yes it is very pricy but it is an electronic component which is what makes it expensive. But when i use this hub for my creations i no longer care for the price do to the quality of this component. I enjoy this hub very much and I recommend it to anyone who build complex models."