So we are having several issues with our Dex...no arrows for up to 16 hours at a time...lots of ??? marks....out of range signal when it's beside her...and last night we started a new sensor and it shut it's self down after I turned it on to hit start sensor...had to do a reboot...that was a first for that!! (Thanks Tammy E for the help) called dexcom today and the customer support more or less told me that the problems we are seeing are normal issues and that I am having to much expectations from it...they where going to contact sales rep to meet with me for training....well that didn't set ok with me so after a not so nice talk with the lady she transferred me to a supervisor who wants to look at our data...I'm all for that accept my computer is in the shop and have no way of downloading on the net book....anyway what I guess I?m asking is...am I overrating Dex and expecting to much from a machine or is what I'm seeing an actual problem with their machine???? By the way we have only had Dex since March of this year! Thanks for the help and appreciate the replys!