After reading this article:
and from it a link to this one:
ABSTRACT Test results presented in this paper demonstrate that some brands of residential molded case circuit breakers do not operate properly within the limits specified by the applicable standard. The samples tested are both used, from homes, and new, purchased at retail sources. The minimum trip current is determined for each breaker. The test procedure encompasses the basic overload trip requirements of the applicable standard. Breakers that do not open the circuit at or below 135% of rated current fail to meet the requirements of the standard. Test results vary substantially from brand to brand. The best brands are essentially failure free. The failure rate of the worst-case brands is in the order of 50% for both used breakers from homes and new breakers recently purchased. Some samples, primarily multi-pole breakers, do not open the circuit at any level of applied current. Failure of a circuit breaker in a home to operate properly when required poses an increased risk of fire and injury.
I am concerned. The second article written only a bit over a year ago says that the same defects in this style of breaker are still common.
I'm considering putting in a sub panel in my garage, and would like to do the right thing. The second article is weasel worded and doesn't identify the various brands, but by implication all of the Stab-Lok type circuit breakers are flawed.
What is the best alternative type of breaker?