Hi, I am currently on Novorapid disposable pens however at a recent appointment with my community diabetic nurse they have suggested I think about changing over to the Novorapid Echo refill pen which is normally given to children The reason I was advised to consider this is I inject relatively small doses of insulin and the Echo pen allows the user to inject half units so can match carb intact more accurately. I welcome thoughts of any adults out there using the Echo pen.