Overall, I have to say that these products are made with good quality. When received, the products come in parts that you must put together. The assmebly is pretty self-explanatory, but there are easy to follow instructions that are included with each product. I purchased the bundle that same with the Play circuit, grooming station, and treat/food feeder. I originally thought that the feeder would be a good addition for our cats to make them work for their food. I have one cat that has been gaining too much weight and thought the slow feeding would help to slow down his eating and make him use his mind a little in order to work for his food. So far, they only use this a little (I have 3 cats). We still have to supplement their diet through the typical feeding, as he gets frustrated with it and just hits the entire contraption that knocks food down. I will continue to work with them on this to try and use this more for the majority of their diet. The grooming station was a bust for our household. It is good quality and easy to put together, but my cats have thus far ignored it after a week of sitting out. It comes with catnip to try to entice your kitties to use, but so far even my cats that can pick up on catnip ignores it. This makes me believe that the catnip that came with it may be old. I thought the middle piece to chew on would be good for one of my cats that is in the stage of chewing on everything, but so far she has ignored this grooming station, too. I will try to continue getting them to use it, and update this post if I am ever successful. The play circuit has so far been the most used piece. When I bought these products, I thought this would be the least used, since my cats already have many toys. This toy however, has been the most successful with my three cats. Sometimes I will make the ball roll to encourage them to play with it, but sometimes they go to it on their own. Two of my cats will play with this together, knocking the ball back and forth to one another. It is cute to watch them to play. We are thinking about buying another one of these to hook to it, since it seems a little short for the amount of cats we have. Adding another section is also in the hopes that they will be more active, and not just lay and play, like they currently do. This track is flat, so that it is easy for the ball to go along the track. It also comes with one ball. The track can be shaped in different ways to help make the toy more interesting for the cats, so that it isn't always in a circle or whatever shap you'd normally see with similar toys. I gave these toys a 4/5 because they are well made and a unique way to help keep your cats interactive. I dedcuted 1 star, because I believe the catnip was old. Also, not all cats are interested, so you may have to work to get them interested, or it could just be a waste of money. Keep in mind that your cat(s) has their own personality and may or may not take to these toys.