We started on the dexcom g4 on Friday. It came with 1 transmitter and a month's supply of sensors (4). My original purpose was to use it for basal and bolus testing one week per month. Apparently the G4 had other ideas! This is our first experience with a cgm as well. What it has done in three days is give us a lot of peace of mind. We haven't slept this well since dx! The applicator looks scary. I gave dd some m and m's to go through with this. After using the applicator, we have to seat the transmitter on the thingy. That was a bit difficult, hope it gets easier with practice. But I would say she screamed for a couple of seconds and that was it. She has never mentioned it again and never notices it even though the transmitter juts out on her tiny frame. We have also told her this reduces the nbr of finger pricks. I thought we would use it just one week per month but I think the lifestyle benefit is too great. The hair size thing that goes in her tummy ( that was our main concern) seems safe too after studying about it. The accuracy is very liveable. The alert while grocery shopping with dd was so useful. The only con so far is that dd loves the receiver, calls it her ipod! There is no screen lock like there is on her pump. Or I need to re-check the manual. The other major con is obviously the cost, compared to test strips. I will post our experience with basal/bolus testing in a few days.