I have been using the Dexcom for about a month now. I previously had the Navigator. The screen might be a little bigger, but the transmitter is tiny. When I put the Dexcom transmitter next to the Navigator transmitter, it looked like the picture I have of my brother’s Great Dane with my Yorkie!
The only thing that I liked better about the Navigator was the ability to set it down and move around without losing connection. You have to keep the Dexcom pretty close to you or you lose connection.
I like the alarms a lot better. The Navigator beeped every 15 minutes when your BS was out of range. That is OK for a low, but when you are high, it takes longer than 15 minutes to get back in range. On the Dex, you can set the length of time that you want your reminders in.
Like others said, the sensor is painless and tiny. The Navigator left big craters in my arm that were still there 5 days later when it was time to put another sensor in.
The sensors are easy to restart. A lot of people manage to get 14 days out of them - I haven’t made that yet, but I will keep trying!
The Navigator has been on backorder since Jan so your only real choices are Dexcom or Minimed.
I did a full Dexcom/Navigator comparison on my blog if you are interested: