I have powergrips on my recumbent trike. I love them, I can put on whatever shoes (well actually only my VFFs , I shortened the straps so only "barefoot" shoes fit now), and go shopping or ride down to the park to photograph ducks or whatever.
On my 2-wheeled bents, I would not consider them - I find them very difficult to get out of!
I love my eggbeater (clipless) pedals for bikes that require quick in/out motions.
Someone on the bent forum recommended trying clipless pedals 1 at a time. If you usually put your left foot down at stops, then try just the right foot in a clipless pedal and use a platform on the left. Then switch after a few weeks. Then try both.
Don't know if that's a good idea or bad. I went cold-turkey myself.