Watercooling: Bigwater 760i

[Jest3r]

Hello All,
I have just installed my brand new BigWater 760i cooling system, My over clocked GPU was running at around 70-80C under max load(Crysis).
Now its running at around 48C under the same load, and nice a quite :D.
It was about 225$AUD to setup for CPU and GPU cooling.

http://www.thermaltake.com/product/Liguid/DIY/cl-w0121/cl-w0121.asp

[blueturtl]

Looks neat but I've always been weary of water and electronics combined.

Was it easy to install?
What kind of maintenance does a system such as yours require?