The idea is great and it is so simple to put together. I didn't even look at the instructions.
Yet, it wasn't worth my time and it wasn't worth my money. From the get go, there were problems. The first problem, which I didn't really mind was that the holes that connects the bag and the frame together didn't line up. Yet, it was very easy to create different holes. The pegs are extremely small so if you have small children or other pets that would chew on plastic parts or just swallow the things, I wouldn't recommend this product for your household. The pegs are about half of a cheerio size.
The other problem is that the bag didn't fit the frame. I took it apart and no matter which way I put it back together, it just didn't fit. I tried to pull the corner over, as you could a fabric but this is plastic so it tore. Instead of tearing it further, which was bound to happen if I kept trying to pull the plastic to meet the frame, I let it hang loose.
My cat had played with it for a few moments and walked away. It seemed she would be more interested in it if I just let the bag unattached to the frame. I could had made the same toy but more sturdier and maybe more interesting for my cat on my own with only three sticks, feathers, a box and nylon line.