We have been using this solution for a year.

We have been using this solution for about three years, and it is deployed both on cloud and on-premises.

I have been working with Portnox CORE for the past two years. 

We've been using the solution for one year. 

I have been using the solution for five years. 

We have been working with Portnox CORE for two and a half years.

Over three years.

I have been working with the product for more than six months. 

I've been dealing with the solution for two years at this point.

We've only used the solution for two to three weeks. It's a product that is still relatively new to us. I tested about six or seven months ago now.