I've flown with TKS and think it is a superior system.
The company that owns the STC for TKS on the 210s is Flight Ice. Flight Ice is a subsidiary of Flight Express, a freight hauler. They have converted all of their 210s (even the ones with boots) to TKS. They are also doing Caravans with great success. As you may know, Caravans have been getting into trouble with ice. TKS seems to solve that problem.
