These are great little cars and my son loves them. The detail is impressive. My only complaint is that after only about 30 minutes of playing with them, the black spoiler on the back of Boost broke so that's the only reason I said "no" to it being durable. My 4 year old is rough with toys though, but it shouldn't have broken that easily. One of Snot Rod's flames came off also but they pop back in so no big deal. Otherwise they've held up well so far.
My child loves this ever since he saw them come out of the shipping container. He takes them everywhere with them and has played with them on cement yet they still are holding up well.