Been building my own PC's since 1991 and have used Corsair excludsive since the late 90's. No other memory manufacture has consistantly provided me with memory that "just works" more often than Corsair. If you want memory that works the first time, every time...look no further than Corsair.
I had some nvidia chipset motherboards that had numerous problems with various brands of memory when trying to overclock on all 4 DIMMS. Corsair and OCZ were the only companies that had RAM which would work when doing extreme overclocking on those DIMMS.
Corsair is one of if not THE best companies out there. Support if/when you need it is nothing short of awesome. Their RAM is some of the fastest, best looking, lowest latency and least problematic I have ever used.
I've got a project due today, so no clever quote from me, although I'll add that I'd like to try a real name brand in memory because I've been using no-name brands forever. I'd like to see what the hubbub is.
Corsair has a reputation for quality and really spends time catering not just to the mass market, but to enthusiasts like us, without exorbitant prices. Their designs don't seem to be the result of a marketing droid trying to make bargain basement crap seem "XTREEEMMMM", but attention to detail and quality that go far beyond the average. Corsair RAM seems to have fewer bad sticks in my experience, and their high end Dominator and Dominator GT have been binned to run cool and stable at overclocked speeds reliably. Their cases meet or exceed the usefulness and build quality of other high end manufacturers like Lian-Li and Silverstone, often with lower prices. The H50/H70 provide a true alternative for highest end aircooling or budget-water, capable of taking hot 1366 i7's to 4ghz while being easier to install without the bulk. They select the very best power supplies - I spend years of frustration with other supposedly "reputable" brands before I switched to Corsair's HX modular line which gives clean, efficient power at the rated spec. My HX1000 has taken anything thrown at it and my other PCs run HX620s, but I'd consider an AX 1200 upgrade if I ever need more power!
This is all made even better by having official Corsair reps like Redbeard here on [H]!