I have been using Microsoft Dynamics GP as a customer for two years.

I have experience with Microsoft Dynamics GP. 

I have been working with Microsoft Dynamics GP for over ten years.

I've been using Microsoft Dynamics GP for about three years.

I have been using Microsoft Dynamics GP for a while now as a customer. It would be around seven years.

I have been using Microsoft Dynamics for the past two years.

I have been using it for eight years.

I have been using the solution for 25 years.

I have been using Microsoft Dynamics GP for over twenty years.

I have been using the solution for 14 years.

I've been using the solution since 2008. It's been well over ten years at this point.

I've been working with the solution for about five years now, give or take.

I have been using it for 22 years.

I have used it for five years.

We've been using the solution for the last 12 months or so. I've personally been using it for five-plus years or so. It's been a while.

Our company has used the current GP 2016 version since we upgraded to it about six months ago, and have used previous versions for quite a few years. I have also used and/or consulted on this product for other companies for the past 19 years.

We have been using this solution for a long time.

I have used this solution for seven years.

I have used this solution for around five years.

I have used it for four years.

We have been using this solution since 1987, i.e., earlier versions of the same product.