New CO2 Generator

I recently noticed an advertisement in the March issue of
FAMA for a CO2 generator from a company called Aqua Medic.
It uses a solid phase/water chemistry reaction to generate
the CO2.  Any idea of initial cost, the cost of chemical
refills, quality of product and instructions, etc?  How does 
this system compare in reliability, simplicity, etc. with
high pressure tank CO2 systems?