Pros: Very nice stylish heat sink design

XMP profile, makes sure your running at the rated specs painlessly.

Rock solid stability

Cons: Price....

Other Thoughts: Had this RAM running 24/7 for a few weeks now, Paired up with a 4790k on a Gigabyte GA-Z97X-UD5H. Passed memtest on 12 passes with XMP enabled, Zero errors running at advertised Speed/Timings and voltages.
Just set the XMP to "enabled" in the BIOS and you are good to go!
The heat sink design is Really nice looking an really goes with my current build's theme. The LED lights are on the "warmer" side of white. while everything else in my build has a "cool" white glow, Not a huge deal. The heat sinks keep the RAM cool under load and thats what matters I guess
The price is a bit hard to swallow, being a bit more expensive than most kits of this speed and capacity. I like to believe the extra money gets you something, but does it? There isn't much info about Klevv that I can dig up other than that they seem to be some sort of "house brand" for Essencore (under the umbrella company SK Hynix), a NAND and DRAM IC manufacture. This probably means that Klevv is either getting first "dibs" on DRAM IC Yields, or at very least getting a better price for higher tier DRAM ICs. I would hope there is some "binning" going on here too. Meaning they test each DRAM chip and uses only the most favorable ones to build Klevv Modules.
If you want the most stable and highest ratted DDR3 chips that SK Hynix produces, look no further!

but be ready to pay for it.

Pros: > Incredibly fast
> Very good overclocking potential (see other thoughts)
> Looks absolutely phenomenal

Cons: > Price, there are nicer DDR3s out there with cheaper price point and just as good if not better features out there
> There is almost zero information or reviews out there for this brand/line
> Might just be me but this almost reminds me of the Dominator Platinum with its black on aluminum housing and illuminated LED (not really a con)
> Timing is a little higher than some of its cheaper competitors
> Single sided integrated circuit (might not be an issue to some)

Other Thoughts: Picked up two sets of these puppies not too long ago, so far I am very impressed with its performance and it looks absolutely beautiful. I was able to run XMP right out of the box, and with very few tweaks I was able to run close to 3200MHz, this is the fastest DDR3 I've ever owned. Although with its beautifully design and incredible performance the price might be a deal breaker for some of its potential buyers, there kits out there with lower price point but includes additional accessories such as fans and ect,