Eric in North TX wrote:
My question is:

What is the best/most reliable unit to put into the tank.


Fluid master is the new standard, and while not fool proof, they give a
lot of service between repairs. I've noticed a lot of toliets now come
with them from the factory.
http://www.fluidmaster.com/usa.html

I have a toilet with the fluid master and the darn float will not go up
far enough to shut the water off. No good.