I spot feed twice a week, and my 2 suns (yellow and black) are super happy, extend their polyps every night, and have actually made a few babies.
I've also gone to spot feeding my fungia, duncan, acans, and open brain. All have responded very well to being fed. They color up nice, grow way faster then when I didn't, and are wide open with feeder tentacles out every night after lights out.
If you don't want to spot feed a sun coral, don't get one. It will starve to death and eventually die. Broadcast feeding doesn't work either as they can not compete for food. What I like to do is broadcast a bit to keep the fish occupied, then spot feed with my pumps off.
Basically if your already broadcasting, its only a little bit of extra time to spot feed. I have a small squirt bottle with a piece of airline attached to the end. Works great and I don't have to get wet.