Both good and bad with Skydrol. Significantly reduced the fire hazard from hydraulic fluid leaks. But Skydrol fluids are also hard on the skin of service technicians, and require special seal materials and any paints/coatings that will come into contact with the fluid.
The current approach with aircraft flight control actuation systems is electro-hydrostatic actuators (EHA's). This is a sealed, self contained hydraulic actuation circuit pressurized by an electric motor driven pump. Much less prone to leakage.