I gave it a go but had a weird event with my Reef Pet's Ultra Violet directly following the first dose. Not sure if it has to do with where I poured it in my tank or what (nearest that piece)
I dosed 1/2 the recommended dose for an sps tank let it mix for a moment with flow on then killed flow for 10 minutes. Walked away and when I came back my RP UV colony had an insane amount of slime all over it. I was like "Daaayum that sucker was hungry!". Kicked the flow back on and it took a few hours for the slime response to stop. Next day it was brown as I've ever seen it. Everything else looked unaffected and it did seem to create some polyp extension during and soon after the dose.
I continued to dose it for 2 weeks daily working the dosage up, mostly because I bought the large bottle and it was just the one piece that didn't care for it. I didn't see much beneficial change in my acros coloration and didn't really see any uptake change either. Granted it was only 2 weeks.
I stopped dosing it a few weeks back and my RP UV is gaining it's color back, so I'm fairly certain for whatever reason that piece just wasn't liking the AB+.
My tank is looking great without it so I won't be using it again.