I've been using the solution for quite a long time. It's been ten or 15 years. I have well over a decade of experience under my belt.

I have been working with it for three years.

I have been using IOS Security for about six or seven years.

I have been working with the solution for five to six years.

I have been using Cisco IOS Security for some time.

I have 10 years of experience with Cisco IOS Security. 

I have been using Cisco IOS Security for around 15 years.

I've used the solution for about eight to ten years.

I've been using Cisco since the late 90s.

I've been using Cisco IOS security for quite some time. Everything worked smoothly without any issues.

We have been using the solution for 15 years.

I have been working with the product for four years. 

I have been using Cisco IOS Security for more than four years.

We have been using Cisco IOS Security for more than ten years.

I have been using the solution for ten years. 

I have been using the solution for over one year.

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

We have only been using IOS (Internetwork Operating System) Security since about 2016. So we have worked with it for about four years.  

We have been using Cisco for as long as Cisco has been around. It is hard to answer the question of when, exactly, we started using this product because they have been upgrading or changing the product as it evolved over the years. It is basically the same foundation and they build upon that over time. I can just say that we have been either using this product or something very similar for a long time.  

I have been using Cisco IOS Security for approximately three years.

I have been working with Cisco IOS Security for three months.

I use version 12.4 and I use 15 and above for the router.

I've been working with Cisco IOS Security for more than five years.

I have been using Cisco IOS Security for more than three years.

We have been working with this solution for around 15 years now.

I have been working with this product for the past ten years.

I have been using the solution for approximately 10 years.

I've been using the solution for over ten years. At more than a decade, it's been a long time.

I have been using Cisco IOS Security for over 20 years.

I've used the solution for ten or more years.

I have used the solution for approximately five years. 

 I have been using Cisco IOS Security for more than five years. 

We have used the solution for four years. It's been a while. We have a bit of experience with it at this point.