I value the stability of the product most. WatchGuard Gateway AntiVirus also has great scalability. But for us, it's only about ten people who use it.

The solution is very powerful.

It is the most effective on non-encrypted traffic and it is able to determine some threats through deep packet inspection. 

There is a basic deep packet inspection within the antivirus that is able to be run against proxy filtering and certain policies. It's pretty standard in the industry. 

The pricing of the solution is okay. It's not the most expensive option.

This product may do well outside of the Chinese market.