There seem to be very few people that have tried at least one other system that prefer Minimed. I personally know of a couple that really gave it a lot of effort and couldn't make it worth using. One that I know of had tried to get a Navigator, but couldn't because of new insurance. She left the Minimed in a drawer for a long time, then decided to give it another chance. It still wasn't good for her, and she ended up changing to Dexcom a few months ago. She really misses integration, but loves the Dex. It is a little harder to discount when you actually know the person as opposed to just a stranger you are reading about on a board. My other friend used it for over a year before changing to the Navigator and now the Dexcom for her son. She LOVED the Navigator, but I think now they both love the Dexcom as well. They had a bad receiver at first though and said it was as bad as the Minimed for them. She finally called Dex and they sent out a new one, and there was a huge difference. Hopefully the same will happen to him. Dexcom is sending my son a new system, because he started getting a lot of out of ranges again. Two that woke him up last night when it was within arms reach, so less than 3 feet away. If he can't get the new one to work well for him, he may just try the Guardian. He said he was ready to throw it out the window last night. He normally doesn't get awakened by alarms at night, which is also much different than my daughter. He has his high set at 200 though, and hers is at 160.