So, it's been a little over a week now, and I thought I'd give some thoughts on the G4 as a user who has been using the MM sensors happily for 5 years now. Insertion: It's nice that you never see the needle. There is an odd combination of steps, but it's not hard. It's nice that there's no elaborate taping ritual. We pulled the first one after 7 days and it left almost no mark on his skin, as opposed to the MM sensors. I'm sure it would have lasted longer than 7 days, but he was complaining about the tape itching. Accuracy: I think it is slightly less accurate than the MM during the first 24 hours. I'm going to insert in the morning from now on for that reason, as it missed some lows during the night the first night both times. After the first 48 hours, I think it is slightly more accurate than the MM. It seems to track highs better, especially. I miss the predictive alarms on the MM, and have set the low at 85 on the Dex to compensate. Many people report readings that are always within a few points, and we are not seeing that, but accuracy is fine. I do like the fact that it adjusts immediately when you calibrate it. I never understood why the MM did not. I should add that we almost always had very good accuracy with the MM, so when I say that accuracy with the Dex is slightly better sometimes and slightly worse at other times, it is also very accurate. Alarms: They're louder than the MM, but I was expecting them to be louder than they are the way that people on here talk about them. The biggest downside (and my least favorite thing about the Dex) is that it always vibrates first, and does not alarm for 5 minutes after that. I don't think it realarms as often as the MM does either. I think we would catch lows faster if the damn thing didn't vibrate first. I do not understand why that is not changable. Range: It's phenomenal. It reads him on the tennis court during lessons. It read him about half the time in the pool the other day. We got decent range inside with our MM, but outside it was terrible. I think we get 50 feet with the Dex sometimes. This is my favorite feature. Receiver: It's basic. None of the information on there that the MM has. No ability to scroll back and see prior readings. No statistics on there, no time to next calibration, no calibration history. The screen is bright and easy to read, except in bright sunlight, when it's very difficult to see. It seems more fragile than the MM. I find myself being very careful with it, whereas we used to toss the Guardian receiver around like a football. Overall, we like it, and the positives outweigh the negatives. It's nice to insert it and not think about it again for 7 days, as opposed to having to restart on day 3 and and 6. It's nice that if you miss a cal, it just keeps giving reading. We love the range. Since we're with t:slim now, and he has to carry a second receiver anyway, I think we're going to stay with Dex. Especially since reviews of the Enlite are not exactly outstanding.