Quick question about g5 and share. We currently have g4 and I'm not sure what we should do when his transmitter dies. G5 has had some mixed reviews. How does share work with the g5? Can he still use the receiver only? He has no phone Or I-device right now. I use one ipad for sharing and following, so I get alarms at night. I have talked about getting him an iPod touch to go with he g5. Are there any huge advantages or disadvantages of using an iPod instead of the receiver? I won't have to calibrate on my ipad will I? I assume I can still get the feed (follow) from whatever device he is using...right? It doesn't make sense to require every device to calibrate, but I want to make sure before we switch. I want the advantages of g5, like better accuracy and not having to download to look at his graphs, etc. but I'm not sure about losing the range we have. Any other thoughts on comparing g4/g5, for those who have used both? Thanks!