Senseonics Holdings ( SENS ) has been developing CGM devices that are far superior to any devices offered by its competitors. Those innovative efforts are yet to yield returns for shareholders. The one major criticismFull-time Equity Analyst and part-time retail investor with a bias for high quality stocks trading at discounted prices. over the past 5 years I've been retail investing and learning more about how the stock market works, following the work of Ben Graham and Joel Greenblatt. Equity Markets are ...