Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not compatible with die-cast Disney Cars!

I purchased this item for my son with use of his die-cast Disney Cars. However, most of the die-cast ones were too big to make the turns on this track. So, even though it is listed to be compatible with die-cast cars, that doesn't necessarily mean the ones from Disney/Pixar! We ended up getting some of the "Mini-Adventures" plastic ones for my son to use on this track as well. That all being said, he loves racing on this track. It is just frustrating that it can not be used as we initially planned and were lead to believe.