I have been using this solution for five years.

I started using the solution in 2015 and have about seven years of experience with it. 

We used this solution at my previous employer for about two years.

I have been using SAP PowerDesigner for the past two years. 

I have been using SAP PowerDesigner for about four to five years.

I have been using SAP PowerDesigner for approximately five years.

I've been using SAP PowerDesigner for over two and a half years.

I have been using this solution for three years. 

I have been using SAP PowerDesigner for approximately two years.

I have used this solution on-and-off for 23 years. 

I've been using this solution for about eight months. 

I have been using PowerDesigner for more than 10 years.

I have been using SAP PowerDesigner for more than ten years.

I've been using this solution for six months. 

I've been using PowerDesigner intermittently, not continuously. I have been using a few other CASE tools as well. In my estimation, I've been using this one since 1994.

I used SAP PowerDesigner for a year. 

I have been using SAP PowerDesigner for approximately two and a half years.

I have been using SAP PowerDesigner for approximately 22 years.

I have been using SAP PowerDesigner for fourteen years. 

I've been using it for about 15 years, starting with v5.0

I've been using the solution for a while. When I use the solution, the need to use it is driven more from the customer's own needs and not from my own. 

I have been using PowerDesigner for three years.

Approximately one year.

I have used it for six months.