Even in ancient times, critics of the skeptics accused them of inconsistency, incoherence, immorality, and inability to live their skepticism.
These arguments were more and less sophisticated, and ranged widely from the claim that skeptics cannot be fully skeptical because they believe their own positions are true to the claim that skeptics will not make reliable friends.
As late as the 1980s, a number of scholars of ancient skepticism continued to maintain these claims, but opinion turned in the 1990s as a consensus emerged that skeptics could indeed live their skepticism, and that they would not necessarily be any more immoral than followers of other philosophies.
Much of Sextus's text consists of refutation of other dogmatic philosophies of the time. Since he quoted their ideas in order to refute them, his text has been an important source of information about ancient Stoicism, Epicureanism, and other philosophies.