I have the water setup for tom. It works perfect and heats up fairly quickly. No leaks, no issues and looks nice installed. My intake is aluminum and was used with the stock exhaust prior to me obtaining it. The aluminum had some major deposits on it and took some time to chip it all out. Changed over to fenton headers so my first layout was to plumb the fentons into the bottom of the intake via exhaust gases. After doing that and reading and talking to others i was kinda steered into going with water due to the aluminum intake and the exhaust combination.
On a cold day i just need to wait a few extra min to let the intake heat up correctly.....no big deal.