This was a Christmas present for my five-year-old son. He really was excited to get it and was asking for it all December. Assembly was a little complex. Some of the pieces aren't marked really well, and are easy to confuse with other parts. We were disappointed that only a handful of the nearly 200 hot wheels cars my kid has would work with the loops.
It seems like it's pretty durable. It's held up to several days of all my kids playing with it constantly. Speaking of constant play: battery life is great. This was one of the most popular toys in our house for Christmas and everybody's playing with it.