It is made of mediocre quality materials and the tires do not last very long.
On the positive side, it has plenty of tires.
I have bought similar ones from the discount store and they were much more durable! They just didn't have as many tires in the package

I would recommend getting straps like the ones that come with the bands and attach them to the handles because the existing ones don't hold up very well. Other than that, if you do some research and find exercises, the device is very good.