The best part about this software which has helped me out from time to time was when I used it for my personal use! Also the fact how quick they respond to client queries even if there are multiple clients at once! Sometimes you may need more than 1 day to have your response back but overall its been fine so far.
Honestly speaking I never had any problem while using their products or service as such. Its pretty simple & easy to understand (once i got into it!). And yes they do really help in securing our network/data by doing some extra checks before giving us access.