[nmehner]

As a diabetic having alarms is the most important thing. Measurements are not that accurate (neither is the finger prick method: If sometimes get a difference of 20% comparing two measurements from both hands). But also the "ok" range of 3.8 mmol/L to 10 mmol/L is quite large and levels can rise/drop 20% in minutes. So it is still quite helpful.

With the CGM there is also an additional delay of about 15 minutes in the measurements. Mostly you want to be triggered when something strange happens and then you do a manual measurement to confirm.

A false alarm of low blood sugar is annoying, but it is a lot better than collapsing. You can relax a lot more if you know you will get an alarm.