I switched to the Next USB after using an all in one meter. Despite not having to deal with strips it did not interface w3ll with my PC so I had to input all data on my phone which counteracted the convenience of an all in one meter. I could not log my carbs / insulin either The Next USB is so simple to use and comes with software that others charge £30 for.. I just plug it in and my data is made useful to me. Best of all no more of those contant cassette error or not enough blood errors...