Code reviews:<p>* signal distrust by default - the work I do is not to be trusted to be merged in and by extension, I&#x27;m not to be trusted<p>* can create a culture of passive aggressiveness - you do something that I don&#x27;t like, I&#x27;ll get back at you when I&#x27;ll review your code<p>* not guaranty code quality - having a junior review a junior&#x27;s code will not yield expert level code<p>Just because Google does code reviews doesn&#x27;t mean you should, for Google a bug could cost millions, for your project a bug might cost 10$, however the overhead of code reviews might cost more than 100$. It&#x27;s important to do numbers and think rationally.