Review on Ringside Heavy Duty Bag Spring: Ultimate Boxing Training Accessory (Up to 150 pounds) - Gray by David Herrera

The spring itself is excellent in terms of effect on the movement of the sack. Rather than bouncing on impact the bag tends to almost bounce and in my opinion that makes training better as the bag's movement after impact is less predictable (I have a 100lb bag). My problem (and it's entirely my fault) is that I'm using a stand that's only 7 feet tall. Once I add this spring the bag gets too low for my 6ft height. Such a bummer because I like the difference the spring makes (which is a big difference) but it doesn't allow me to train properly as the top of the bag barely reaches eye level with the spring. So if you are thinking of buying this to use with a hanging bag suspended from an 8ft ceiling I highly recommend this. Unfortunately, if you're a medium-sized male with a heavy bag holder, this probably won't work for you.