Patients in this study are used to perform SMBG. During the study, they are asked to monitor their glucose concentrations in a controlled, specific frequency (different kind of usual care are compared). And they are asked to fill in 3 questionnaires in the beginning and at the end of the study. Extra HbA1c measurements can be necessary. No side effects are expected, but safety is incorporated through HbA1c measurements every 3 months and every 3 months the diary will be discussed in the scheduled visits. Furthermore, extra measurements are allowed when necessary.