I have been working with this solution for 15 years.

I have been using the solution for six years

I've been using the solution for three to four years.

I have experience with Barracuda Web Application Firewall. I am a system integrator, and my company takes care of the deployment process for our customers.

We've used this solution since last year.

I have been working with Barracuda Web Application Firewall for the past two years.

I've used Barracuda Web Application Firewall for six months in the past year.

I have been using Barracuda Web Application Firewall for four years. 

We have been using Barracuda Web Application Firewall for two years.

I have been using the solution for two years. 

I am currently using the Barracuda Web Application Firewall.

I have been using this solution for a year. 

We have been using Barracuda Web Application Firewall for two years now. At present, we use the latest version.

I am using the solution currently.

I have been using the solution for one year.

I've been using the solution since 2009. It's been just over ten years now.

I've been using the solution for a while now. It's been about five years.

We've been using the solution for close to two years at this point.

We have been dealing with Barracuda Web Application Firewall for more than four years.

I've been using this product for four years. 

I have been using Barracuda Web Application Firewall for a few years.

I have been using the Barracuda Web Application Firewall for three years.

I've been using the solution for almost four and a half years.

We implemented Barracuda Web Application Firewall around four years ago. 

I have been using Barracuda Web Application for five years. 

I have been working with this solution for three years.

I have been using this solution for approximately three years.