The best of the best.
However, no servo is indestructible.
The laws of physics still apply, and micro servos use smaller components than their 1/10 scale counterparts. A crash under the right conditions can send an incredible spike of energy into the steering system.
If it ever breaks, just know that any other brand would have as well, but earlier into the abuse. :)
The LC Racing BHC-1 lineup, which has no servo saver, is particularly hard on micro servos. Even in apparently "mild" collisions, we have witnessed all of the top servos on the market break, especially when the steering rack, bell cranks, and horn are aluminum, as there is nothing to flex and absorb excess force.
We're working on developing a servo saver for the BHC-1 platform.