The main reason for clipless pedals is that they permit you to pull up, with your legs, on uphills, thus maintaining a RPM that is more effective than pushing a too-high gear or getting out of the saddle to 'push and shove'. The trick then is to seemlessly apply power through the entire crank revolution through conscious self-training.
Commuters often find themselves in strife if clipless pedals are set too tight e.g. disengagement is not spontaneous in heavy traffic and a spill occurs. So it is necessary to set the release to the lightest 'tug' without actually allowing your foot to disengage unexpectedly. Then gradually increase the tension as your confidence in traffic grows. A pedal that does not disengage when you absolutely need it to is disastrous in traffic.
Shimano SPD pedals are fine; I have used SPD for 20 years (road, touring, MTB) and now use a mid-range resin-framed double-sided SPD with self-raising front edge which takes either my Diadora cleated shoes or street shoes for the quick dash to the shops. The Crank Brothers egg beaters are very small in profile and some cyclists are known to get a sore spot in ball of their foot from the tiny platform. These 'minimalist' pedals are best left to MTBers in competition or who really need the weight savings.