I have been using the solution for ten years. 

I have been using F5 BIG-IP Advanced Firewall Manager (AFM) for approximately four years.

I have been using this solution for eight years.

I have been using the F5 BIG-IP Advanced Firewall Manager for two years.

I have been using Advanced Firewall Manager for seven years.

I have been using F5 BIG-IP Advanced Firewall Manager (AFM) for approximately five years.

We have been using F5 BIG-IP Advanced Firewall Manager (AFM) for three years.

I have experience with F5 BIG-IP Advanced Firewall Manager (AFM).

I have been using F5 BIG-IP Advanced Firewall Manager (AFM) for three years.

I've used the solution for around four years. It's been a while. 

I've been using the solution for the last three years. 

I have been using F5 BIG-IP Advanced Firewall Manager (AFM) for approximately 11 years.

We have been using F5 BIG-IP Advanced Firewall Manager for four years.

I've been using the solution for two years or so now.

We've been using this solution for four years now.

We've been selling the solution for five years now.

I have been using this solution for three years.