I have had terrible service for years, and finally got my doctor to send my Rx elsewhere. Problems include:
1. Frequent mistakes in bills causing me to call and resolve
2. Constant upselling every time you call
3. A really janky web site that often has problems and is terribly designed.
4. Really crappy customer service: push you towards a new machine that doesn't work with your current supplies and won't trade in old unused supplies for ones that work with the new device
Recommendation: Find anyone else