"I was a little hesitant with this because of the potential difficulty involved with the motors and the app (which we hadn’t had experience with on other LEGO builds), but I am so happy we got this for my son. He’s 7 and has a lot of LEGO experience and is a very fast builder, so I thought this would challenge him...and it did. The build time wasn’t too long. He worked on in for a couple hours and we figured out the whole app. In the end he really enjoyed it and loves playing with it. It’s almost like a remote control toy. Well done LEGO for taking it to the next level with the added technology."