David. I have been running the car with the Varicool S-HSV for little over a week and a half. I was expecting some small problems seeing these are prototype valves. After all I tourtured them them for several days straight before they went in the car, and I can only guess at what you put them through.
Happy to say
no problems what so ever.

No Leaks internal or external. And I have to say this is a very nice upgrade to a Existing Varicool system.
I have been using the WI every day on my dialy commute. Not that I'm always on the throttle... Drivability wise there is a noticable differance. For lack of a better discription this is just smooth.
I think that just having the pump pressure there at full and ready to go makes a big differance in how the system reacts.
And also 'Good For You' for making a product that would NOT require me to discard my current system and purchase everything all over again.

My wallet and right foot thanks you...
I can't wait to see what is in the works next for the Varicool systems.
Peace
John