"We bought the previous set for our first son about 7 years ago. It was absolutely brilliant. Battery lasts many many weeks. It was well designed, providing great fun for 3-4 year old. It is still working and he has had great memories with us playing with this set. We decided to buy this new set for our 2nd son. To have his own, and merging the two sets together. What a great disappointment. Firstly, th battery life is less than 2 weeks. Absolute shocker for you to make something in these important ECO times. So you want thousands of parents to chuck 4 batteries in the bin, every 2 weeks? You couldn't do a rechargeable pack? After 6 weeks playing, the train is already making clicking noise, indicating something has broken or worn inside. We are trying to return to store. The build is extremely simple, much simpler than previous - crane consists of 4 or 5 parts. Not much fun to put together. It is still nice set but for the money I wouldn't recommend. Despite the sensors and camera, it feel like regression on fun big time from previous set."