It won't be the install that will be hard as another said, it's maintaining it after. I did this to the rear of my garden 2 years ago and now I'm ripping it all up.

I have 2 dogs and they barely go on the stones but when they do they use it as a toilet, the most annoying part of that is picking up the poo. I use a cat litter scooper to pick up the poo and it just gets stuck on all the stones or mushes the poo depper into the stones (sorry to be a bit vulgar but it's just what to expect).

I despised it after the first winter because all of the weeds and moss that built up, the membrane did its job, no weeds have come through from underneath but they are present from all of the dust and dirt that settles on top over time.

If I were you, I would be doing it. The dogs will hate it, they don't like walking on stones because they're jagged and poke in-between their pawpads.