Lemon Peel/Mushrooms

As with most stuff on the internet, I`mgetting mixed messages regarding
Lemon Peel Angels,Coral Polyps and Mushrooms.
Some places say LPAs are reef safe, some say they may nip at soft corals.
Does anyone have an opinion on this through direct observation? If they do
"nip" mushrooms, do they eat the whole `shroom, or just take chunks out? And
if they do take chunks out, do the corals regenerate?
Due to my tank size I was thinking of the Lemon Peel as an alternative to
Yellow Tangs. I have also heard that the Tangs are more succeptable to
parasites.

Thanks again................