The motor isn't super noisy but does make *some* noise if this is a concern.
The battery pack is placed into the train in a way that you can turn it off and on without needing to open the train up and you can change the batteries without needing to dismantle everything.
If you use a mobile app you do not need as many batteries. It has multiple speeds and can go backwards.
I love that this has a wheelchair user, LEGO is great at disabled representation and diversity.