Cons: the "wheel" design that has spokes radiating out from the center is especially good at trapping dust and becoming impossible to clean. (the gaps between the fins become small enough to catch dust as you move closer to the center.) once the layer of dust is covering the fins, the fan itself become...
Summary: I've been very pleased w/ Zalman products: the pure copper stuff. This only has a copper core, which obviously makes the cooling capabilities sub-par. If you're looking @ this HS, move on to something with a pure copper base or better.
Cons: My 3GHz Prescott died under it w/o any oc. I used AC Ceramique. When I pulled the HS I noticed the surface had discolored, (the usual color after removal). My 2500+ Barton is still running with another one, only with 3 degree drop in temp, idles @ 42 w/o any oc, (wouldn't dare w/ this HS).
Summary: Get something with heatpipes and spend money on Arctic Silver 5.
Pros: It looks cool, and cools about 1c better than stock.
Cons: For the money, not worth it. I bought it just over a year ago, and honestly, the 92mm Copper/Aluminum combination isn't good at all. Running it on a un-OC'd AMD Athlon 64 3200+ Newcastle core, S754, my temperatures hardly went down.
Summary: The Zalman website states that this CPU fan fits to Socket-A. But it is not true if your motherboard doesn't have "heat-sink holes". Unless you go read the manual carefully, you can't find this information.