Ummm...Well the needle doesn't stay in you. It is like a tube over the needle. So you inject the needle and then you take the needle out and the tubing stays. The length of the tubing varies but I have the longest length available which is 43 cm. I have to wear it all the time..sleeping or not. So that is where the 43 cm tubing is nice. I tend to squirm a lot when I sleep so it tends to wrap around me a bit.

Around the site (where the tubing goes in under your fat) there is a pretty good sticky tape like thing that holds it in place. It never comes out on its own unless it gets caught on something like a door handle. And even that doesn't hurt...kind of like a band-aid ripped off. THis is where the 43cm tubing is also nice cause if the pump falls out of your pocket it freely falls to the floor and doesn't pull. If it does get caught you usually know it before it getspulled out. As far as eating....you can usually eat what you want freely....I don't stick by a day to day schedule but like anything else you have to do it in moderation. Some foods are harder to control like pizza and pasta but once you learn how to manage these with a pump it isn't that hard. I love my pump. I have had a pump since 1998 and it is awesome.My husband is also a type 1 diabetic and he wears one. I am 16 weeks pregnant right now and can't imagine managing my diabetes with pregnancy with out a pump. Feel free to ask any questions I am a huge pump advocate.!!!!!!!!