Washed out comments. I know this review is a little older, but all the people commenting on it are obviously biased against internal sealed water coolers.
I have been using an H70 for about 5 months now and love it. I have set it up using 2 Scythe PWM fans and a PWM splitter so the BIOs is controlling the unit. My Core 2 Quad 2.5GHs was reaching 72C before switching to this cooler. I got the H70 on sale for $79. I have overclocked my CPU to 3.3 GHz and my temps after an hour of Prime 95, with two HD6970 cards running furmark are 56c. You can see my build and tons of others at overclock.net in the hH50/70 club and more builds in the Graphite club and the Obsidian club amongst others. Considering how popular these types of coolers are getting, all you people are missing out.
This is an excellent cooler, and the value at the $80 price I got it for is great. Best of all, I don't have a big chunk of metal the size of a small motor hanging off of my CPU socket. I'll take this cooler over a massive air cooler any day.
BTW, to the person saying the H50 was prone to leaking...B.S. Link to it please. I have extensively researched this line of coolers, and the number that have leaked are a lot lower than the number of people with full water coolers who have caused their own leaks. Prone to leaking means a large percent. I bet less than 1% end up leaking, and most of them are because the people installing them caused a kink. I have seen a rad seam leak, and a couple at the barbs and that's about it.
On top of all this, Corsair will replace your damaged equipment if their hydro series product leaks due to factory workmanship. Their new hydro series coolers (H60, H80, H100) come with a FIVE YEAR warranty.
All I've seen here is biased comments from people who have never tried one of these types of coolers.