I am a fully grown adult and have used handset operated pumps and also standalone. For a child like a girl, the best pump is probably going to be the smallest and also be discreet with a reasonably easy to use menu system and good range of infusion sets. The 640G is a tiny bit big so I wouldn't want it myself but others think it's great non the less. At a recent TAD event I went to, there were quite a few people using the Insight pump with xDrip/Dexcom on their mobile phones and these also included parents of children. Also the same for adults using the Combo pump with xDrip as well. So, cgm is obtainable for probably all the pumps now but it also greatly depends on the cost of buying the sensors and how long they will function for. Value for money and accuracy is most likely with Dexcom at the moment. The Vibe pump works very well with the Dexcom G4 sensor and the next generation of the pump will be a bit like 640G in that it will be able to adjust the basal downwards if the cgm sensor detects low bg level coming but when this next generation pump eventually arrives in the UK is in the lap of the gods but should be within the next 2--4 years but no mention as to whether it will be handset operated or the size. So lots to think about and weigh up the pro's and cons for all the pumps.