Critics often say that the only thing it prevents is winning.
In fact, it is its misuse rather than its design that often leads to failure. Obviously, six defensive backs and only three down linemen is not going to be particularly effective against the run. However, it is a formidable pass defense. Intended for specific applications and limited uses, repeated use of the defense does, in fact, allow steady movement of the offense especially if the offense is willing to run inside and throw short. Designed solely to stop the quick strike, deep pass patterns, and if used sparingly, the 3-5 is a valuable asset to any team.