There really should be a zero star rating because Dexcom has truly earned it! If you can avoid customer service altogether, I would give it three stars, but unfortunately, you can't. If this company supplied Aspirin or Band-Aids, they would've gone out of business years ago, but they supply potential life-saving devices and handle it with the utmost disregard for all customers. The wait time just to talk to someone can take up to forty minutes, and if you leave a call back number in which they promise to get back to you in thirty minutes, you will be lucky to ever hear back. Once you finally do get connected and transferred several times waiting even longer for someone to pick up, you will find out nothing, or worse, a completely false story.
Days and weeks later when you don't receive your life-saving supplies, you can go through the entire process again. You constantly get email reminders of upcoming prescriptions needing your doctor's approval, or you need to update your payment method, and when you call you will be told to just disregard the emails. If you try to order anything online, you will find that there is almost always a problem and additional information needed and your back to calling.
I've been a Type 1 Diabetic for 36 years and I have never had to work with such a completely inept, insufficient and unequipped organization. I have found the device somewhat helpful but will no longer continue to order supplies because you can't count on anything they say or do. If you decide to order anything from them, don't say I didn't warn you!
Bottom Line: No, I would not recommend this to a friend