I have been working with AWS Cost Management for four years.

We have been using AWS Cost Management for two to three years.

I have been using the product for a year. 

I have been using AWS Cost Management for two years now.

We have been using the AWS Cost Management tool for two months.
It is this solution that give us trusted data.

AWS has been running in the organization for six years.

I've been familiar with this solution for the last year.

I've been working with the solution for about four years.

I've been using the solution for two years.