I've used the solution for more than two decades. 

I've been using the solution for seven years and the company has been using it for over 20 years.

I've used the solution for 19 years.

I have been working with JD Edwards World for almost five years.

I've used the solution for the last 12 months at last. I have a client using it currently and I help support them. 

I've been using JD Edwards World since 2001.

I've been using the solution for four years. I've used it for a while at this point. 

I have been using JD Edwards World since 2001.

I have been using JD Edwards Worlds for three to four years. 

I have been using JD Edwards World for approximately 12 years.