What are the advantages and disadvantages of using the "Direct to tower" or PAC file methods for redirecting traffic to ScanSafe?

A.
Advantages: ease of deployment, especially for multiple breakout points Disadvantages: no user granularity

B.
Advantages: user granularity
Disadvantages: requires additional hardware for each breakout point

C.
Advantages: no browser changes required Disadvantages: not all browsers supported