US-based burger chain Shake Shack is reportedly seeking an IPO, which would make it one of the first ‘better burger’ chains behind Five Guys to pursue a national expansion. Typically, many major restaurant trends have a well-defined boom and bust lifecycle, but the better burgers trend is extending far beyond the normal lifestyle-driven trend. Although Shake Shack is a regional chain with a long road ahead to becoming national, its design and appeal give it a good chance to come out on top among the competition.