The Tiger I didn't break down much more often than any other tank really. The problem was that when it did, it was a nightmare to service. Way too complex, and too slow for divsional use. The Elefant, Jagdpanther, and King Tiger were more prone to break down. Early Panthers were infamous of barely being able to get into the battlefield. The Jagdtiger.......The Jagdtiger was just very very unreliable. I see it as the epitome of German heavy armoured vehicles but to the most extreme: Very effective, when it did do its job, but just a logistical headache.