I also have a CGMS. The amount of information I have gotten from the devise is incredible. I am still trying to adjust my pump so that I can get the best control possible. Already my HgA1C is down over a point.

And I know it will come down further.
The first few months really surprised me. I had not even realized that my BS was fluctuating that much.

No wonder I have had so much problems with my control.
When you first start out, have A LOT of patience. It takes a while to find the best spots to put it, make adjustments, etc.
I do think you will LOVE it once you get used to it.