Martina C. 5 Great stand Boxing Bag!The Set up is very easy and it feels strong!I filled the Bottom with Water,just half the way until full and it’s definitely enough.One you build it up,you can NOT refill Water or Sand unless you open all parts...The Bag stands stable(super strong hold) on Tile FLOOR as we have at Home,but you are not able to move it around...so I added some cheap tile carpet that I can move it around while cleaning.I am a Hobby Kick Boxer,just for fun or a bit DIET,I punsh very hard and Kick it until my legs hurt...but it doesn’t move at all...It looks good too,have no smell or any Color runs out...GREAT ITEM.With two big and strong Kids in the House it’s definitely a great buy...for stress relief ??Highly recommended,also seller are nice with late delivery information.Build up is easy,me female,did. it in under 30 min.THANK YOU SELLER FOR YOUR TRUE PRODUCT.