I had been working in this industry for years now but never seen such an effective system as it was from them! They were very helpful during my time here at work - they even helped me secure some of our systems by providing us tips about how we could have avoided certain attacks etc which really made life easy while protecting everything around ourselves (including data). It's not so much expensive or hard-to implement/use because all their products are well designed & useful too. You can't find any flaws either regarding functionality nor design quality after using these guys' offerings. Nothing specific except perhaps maybe if there will be more tools available down the road then people might need additional training sessions before implementing things properly since sometimes one needs help understanding what exactly he should do next. At least when i used Sx i always got support whenever needed either through emailing.