I want to first start with the customer service. I first recieved a damaged bag. You can tell by the way the box was damaged that it was damaged during shipping. I messaged the seller and within minutes I had a reply. I sent them a few pictures of the deformed bag and of the box. Right away they told me they would send me a replacement. I recieved the replacement within two days of messaging them. By far the best customer service I have ever dealt with. 5 stars!!Now let’s review the bag itself. I have a wavemaster in the yard. The wave master is very bulky and even when filled with water it moves around a lot. I had purchased a heavy bag but the space I am using in the basement is very small and with low ceilings. This bag was perfect for the space! It has the perfect size and height. The suction cups on the bottom are amazing! It didn’t work on the gym mat, but I cut a hole out and the suction cups hold it pretty steady on tile. It was able to take strong kicks and punches without moving from its place. I was extremely impressed. I filled the base with sand. It took 2 60lb bags of play sand. The sand gave it a more stable foundation. The sand plus the suction cup, the bag is not moving no matter how hard you strike it. Only thing was the size funnel I had made it a tad difficult to get the sand in quickly. It took me about 20 minutes to get it in. Which is not bad for the sturdiest portable bag.Putting the base together with the bag was the simplest part. The easiest and fastest installation. It was very straightforward and the one tool needed was provided. I give this item 5 stars. I would highly recommend purchasing it. The price is also low in comparison to other products that do the job. You can’t beat the price, the customer service, and the quality of the bag. Don’t waste another second debating it!! Make your purchase!