Joined: Aug 2009
Posts: 7,716
Likes: 4,116
From: Berkeley, CA
Bikes: 72 Cilo Pacer, 72 Gitane GT, 72 Peugeot PX10, 73 Speedwell Ti,l, 75 Peugeot PR-10L, 80 Colnago Super, 81 Zinn, 85 ALAN Cross, 85 De Rosa Pro, 86 Look 753, 86 Look KG86, 89 Parkpre Team, 90 Parkpre Team MTB, 90 Merlin
No based on any personal experience, but I'd imagine the benefits are that half cages keep the foot in a consistent position and reduce the chances your feet will inadvertently slip off the pedal.