There are two main aspects that come to mind. First, since we transitioned to AlwaysOnIT we have had very few issues that have come up in regards to viruses like we used to have in the past. Second, when an issues does come up they have very fast response times and fix any issue quickly with strong communication throughout.
The biggest benefits: Little to no down time or computer crashes with the pre-emptive and proactive maintenance. Knowing that if something were to happen you are local and could come onsite.