I have this growing in the DT. I like it for the same reason: very natural looking.
The tank is run with fish, live rock, and in the future a bit of coral (softies/lps).
It grows well, it has never overgrown the tank when I have been taking care of it properly i.e. checking water quality, making sure folks keep the light on my preferred schedule,etc.
Only during the summers when I have other folks take care of the tank does the algae grow like a weed. They usually run the tank lights WAAAAY longer than they should and over feed.
Also, it takes awhile for the roots to take foothold on the substrate and also to start propagating themselves.
So, you'd have more than enough time to move the runners (root system) if they moved near your coral.
It's not like one day you have a few stalks and 3 days later BAM reef grass all over the tank.
It's not difficult.