With all standing punching bags they are going to slide a bit. This one is better than others. The bag itself attaches to the stand via hook and loop straps. So you won't be constantly reattaching the bag.It says it weighs 250Lb when assembled. I got around 270 lbs of sand in it and topped it off with around 8 gallons of water. So it should be weighing in around 330lb.I have not managed to tip it over so far. The higher you hit it the more it jumps and is prone to sliding. Its not bad at all at that weight though.Between this and the Fight Camp bag you will be saving some decent cash.Being one of the best standing bags they price it accordingly. This thing should not cost north of $400 IMO. It does because its way better than almost every other standing bag. If you have the money I would def spring for this one.To fill it. Get the driest sand you can get 250-300LB. Get the largest red funnel from an auto parts store.Tape the funnel to the base. Find something to put the sand on while you fill slightly higher than the funnel taped to the base. Cut the end of the sand bag and allow it to slowly fill. If you pour it fast and it clogs you are adding alot of extra time unclogging. Once you have the sand in you can add water slowly to add extra weight as it fills area between the sand. The manufacture does not recommend this.For a standing bag I would def recommend this one. I've only had it a few weeks and so far it has held up with me doing about 5 workouts a week on it. I've kickboxed before and would say I hit it pretty heavy. I will update later if anything breaks or wears out.