The layout is HUGE, you need a good 4x2 metres and the cars are FAST compared to the old sets...... You can't put your finger full down on the controller otherwise you will spin off the track! Fantastically detailed models, although... I managed to snap off the spoiler and break the front grill in a high speed crash on the first day, ha ha (Nothing a tiny bit of glue wont sort) hence the 4 stars for durability.
Educational wise......... I gave it 5, I guess that speed + sharp bends = Broken car... so dont drive fast... or you will die, lol... fast round bends that is :)
Seriously though... If you dont buy your children this set, you are BAD PARENTS.