I've used it, and also Messenger, on my pot plants in the past. If you suspect it's causing hermies, I'd be the last to argue- that would not surprise me in the least. I have to make the disclaimer that when I tried it, I was running bagseed still and was pretty much used to dealing with hermies, and didn't try to figure out where they were coming from- the assumption was crap genetics.

I would never use a hormone like that not labelled for cannabis use in the last month of flower. Other than that, if you like it, eh go for it. Do a side-by-side test with two groups of subjects that are cloes from the same mother, one set treated and one not, and check for hermies, budset, and yield.

I did really like Messenger on my vegging plants, but haven't used it in years, and wouldn't ever use it in bloom. It's a pretty expensive product that I think it intended primarily for turfgrass applications.