The Tower 120 from Tuniq is now one of the more popular heatsink/fan combos out there. It users a large fan to keep sound down, which is always nice. It also employs a very effective heatpipe architecture that most of the top-end coolers are using.
My experience in installing this was nothing too troublesome. Granted, due to the sheer mass of this cooler, I was at times a bit nervous that I may damage the CPU while tightening, or possibly damage the mainboard when I turned it on it's side in my case with the cooler attached. Nonetheless, I have had it installed and running with no problems for a few weeks now.
You would expect this kind of cooler to do a great job for being this large. Yes, it does a great job, and without sounding like a hair dryer. This is definitely one of the best coolers around the $50 price point, and with the great overclockability of some of the core2duo and quads out there, this cooler can help you use those chips to their full potential.