Originally Posted by
Schwinnhund
I don't use clips or clipless pedals. On a 'bent' I don't think you really need them. My feet never slip off the pedals on my 'bent'. Of course, at my age and state of health, I do not race or ride particularly aggressively. I consider it a successful ride if I arrive alive, and relatively unharmed, no matter how long it takes me.
This depends on what, where, and how you ride.
If you're sufficiently reclined, the only way to keep your feet on the pedals if they're not clipped in is to either hold your legs up or continuously push hard enough that friction keeps them on. Wet, hitting debris/holes/whatever, momentarily needing more power, or simply needing to change pedal positions are all situations where clipless helps.
They're not for everyone, but they can significantly improve both comfort and safety.