Dexcom G4 Platinum

I went to a new Diabetes Center yesterday I am very happy with my choice. Saw the dietitian , she is on a pump. Nice she understands issues. Our concerns are spikes,mostly post meal and post exercise lows. She gave me information on continuous glucose monitoring DexcomG4. She said the doctor recommended this,see him in a month. we have to get a pure insurance approval before anything can happen. I am active,this would be good feedback also,not having to test as often. Any feedback would be helpful.Any other type 2 use one? She mentioned that the doctor would be doing some med changes when I see him. I have had A1C in the 7’s for 2 years. thanks in advance. Nancy