Inclusion criteria  Female and male patients 18 years or older who meet all of the following criteria:  Patients treated at Washington University outpatient clinics or Barnes Jewish Hospital. Patients with type 1 or type 2 diabetes mellitus who utilize CGM and/or insulin pump therapy. Patients who were able to read English.  Exclusion Criteria  Patients who have not used a relevant device in the past 30 days Patients unwilling to or unable to provide consent or complete the questionnaire.