The Case for Gingerbread
Gingerbread is a very cheap Icebreaker program that can fairly reasonably break a number of generally difficult and dangerous Sentries (as well as Viktor 2.0, Viper, and Salvage). Combined with a Mimic, a Runner can break 40 of the 46 Sentries in Netrunner with the following 6 exceptions:
Archer
Swarm
Mamba
Susanoo-No-Mikoto
Janus 1.0
Grim
With Gutenburg arriving in the SanSan Cycle, and Checkpoint releasing with Order and Chaos, there is case to be made for using a solid Tracer-breaker.
The Case Against Gingerbread
Of the 46 Sentries in Netrunner, Gingerbread can only be used on 20 of them, most of which are not played with much regularity.
The average cost to break using it is 3 credits.
It takes up 1 MU.