I always used toe clips till recently . Then within the space of a year I fell over three times standing still when my shoe caught on the straps . The third time I broke my hip (less than 100 ft. from my house).
I have changed all my bikes to flat pedals. The only issue I have had is occasionally having my shoe slide off the pedal. Now I have pedals with pins and soft rubber soles that grip the pedal more securely. Everyone I know that uses clipless pedals has fallen over at least once. For me it isn't worth the risk of breaking my hip again.