Gary's experience is the same as everyone I have heard who bought one. Calibrating it every time is good for digital reading and its accurate, but the amount of time and effort is the same as a good quality test kit. By the time you pay for the unit, batteries and factor in the time it doesn't make them very attractive.
I have heard a couple of companies are working on continuous monitors for cal and alk, but nothing on the horizon as far as release etc. When/if they do get out in production, they will be hot items if they work.
