I had a mk1 which broke fast, they then sent me a mark 2, which for one reason or another sat in my unit un used for some time.
Last week I thought I would give it another go as I think its a great invention.
I still think its very clever. But... It may only add a bit of weight but because its at the business end of the pole I think you really notice it. I also notice the length it adds when closed in a tight space.
I ended up taking it off and didnt miss it or the water it would have saved.
Dont get me wrong im still a big fan.
Aquadapter, please make a mk3 half the weight and half the length or less and im in!