I had never used a waterbag before and never really trusted them, but needed to save space but still wanted a bag so tried this.

Pros
Heavy Duty Material
Sturdy and Robust
Can take a lot of punishment and stays pretty much put.
Heavy, I struggled to get this up on my own. Still a positive though as the heavier the better.
Gloves ok but better with bag gloves.

Cons
Difficult to fill, could use a hose adaptor for it or better filling valve

Been using this for 3 years and it still has no damage despite the fact that I’ve been practising with it 2 days a week! The height is adjustable and it is very easy to use. I use it indoor and outdoo

The bag is great, you can really put some heavy shots into it.
There is one problem I have experience so far, the pole connecting everything together has a screw in, height adjuster but there are no holes to run the screw through, so you are just left with a dented inner pole (images will make sense). So when I do some straight and upper cuts the top part can be seen flying across the garden.
To fix this problem some holes that go through the poles at adjustable heights would work great
At the moment I am thinking of making my own holes.
Something like in the last picture would do the job nicely.
Other wise the bag is great, it still works at it is but I just want to be able to hit it harder.