I found the bottle emptied very quickly. I might have had the water turned up too high. My tap is a long way from my garden, so you kinda just have to turn it on and hope you got it right.
Still, if you want to cover an area quickly, and you’re planning on re-using the bottle with your own concentrate it’s probably a good deal.
We’re expecting a storm this arvo; but Sunday is my own hose day; so I’ll be out there anyway ‘cause my garden needs a dose of fertiliser on everything. I only have 1/2 an hour of hose time, so putting the bottle on the hose lets me get a bigger area done in the time.