Here's some info on my experience with it. :D
Growth: The macro itself grows pretty quick, you should see each branch have a new pearl about every week or two. However, the holdfast that forms at the bottom end does take while, a few weeks to maybe a month and a half for me. I never glue any type of macro just because it always seems to die on me with glue. So for this algae originally tied it down with fishing line to some rock rubble and just made sure the bottom was touching where I wanted it to attach to. Once the holdfast grows in its pretty solid.
Lighting: I have two Kessil A80 Suns and a cheap LED Aqueon strip light that has blue and white lights. Overall, my lighting is a little under-powered for a 90 gal. Because of this, I have it higher in my tank that you might want to place it. The macro likes moderate light so if your tank has strong lighting I'd put it in somewhere in the bottom half of your tank.
Flow: I just have 2 HOB Seachem Tidal filters and two Hydor (1050 gph) powerheads. IME, as long as it's not being completely blasted by flow it'll be ok. But the pieces that have grown the fastest have moderate flow that is enough to make it gently sway back and forth.