I'm talking about the large 7x 7ft, multisport spot rebounder, that I've just bought to use for tennis practice. Firstly, the design is simple, and it can be assembled quickly, by two people. With only one person, it's more difficult due to the force needed to bend the poles and locate the net across the top. Once you know how the frame should go together, it can be assembled easily. With the frame in place, you hook the net over the four corners, but beware, the top two take a lot of effort, and you may feel like the back posts will break with the tension, but they do bend a lot, and this keeps the tension in the net when assembled. We had problems at first, as the instructions were incorrect, and it took several emails to solve this problem, as they sell several rebounders and they also updated the design recently. Once those problems were solved, people at the tennis club can now assemble it, so I'm now happy. In use, I'd say it's very useful, watching from the side you can see how the ball rebounds left from the right of the spot, and right from the left side. It can also do this from above and below the spot. We managed to practice forehands, backhands, serving and even volleying. It's helpful to encourage more footwaor as well, but one thing, you can't do is lobbing..... shame! Overall, it is a well designed product that can be used for practice in a variety of different ways. I'm sure it will see a lot of use at our club.