Pros: Very stable and fast!
Cons: It's spendy no matter where you live.
I knew before purchase these are overkill for AM3 but bought with future upgrades in mind and am not disappointed in any way. They run 27c to 28c everyday work loads to 37c max after 28 hours of prime95 without the cooler in my Elysium. This includes the added +.125v Dram voltage I ran to stabilize a 4233MHz CPU with a 3211MHz NB Freq.
I haven't spent a lot of time tightening so far other than command rate so I can't comment more.
I've been hoping to hold off for the 10XX chipset, but this Ram may change that.