I have experience with Datto Remote Monitoring and Management.

We've been using Datto for about three years.

I've been using Datto Remote Monitoring for the past four years. 

I have been using this solution for the last month and a half.

I have probably used it for about four and a half years.

I have been using this solution for four years.

We began using this product when it was Autotask, which was purchased by Datto.