Pros: Drive is a plus against anything that isn't an SSD or SAS drive. Boots Win7 x64 in 20 seconds or less. Loads bigger type games like Skyrim, BF3, and LA Noire with pretty much no wait time. BF3 maps load before most of the remaining party's is fully loaded(great for grabbing jets before other people do :P). Win7 Apps and Index search show significant speeds compared to a 7,200RPM HDD. Read speeds bench around 160-170MB/s.

Cons: Not an SSD which will always be faster. Thats just technology. But if your running a SATA II mobo, its not worth running an SSD(and a SATA II SSD is just pointless when your money can be put towards a SATA III SSD)(SATA II ~270MB/s, SATA III ~550MB/s) An obvious difference there.

Other Thoughts: I see a lot of comments targeting Windows not seeing the drive or unable to install the OS. I ran into the same situation but before you think the drive is shot, 1) These kinds of drives need to be formatted clean of a filesystem. 2) Make sure BIOS is set for AHCI mode and that BIOS is updated to latest version. Once you do these you should see the drive during install as I did.

Pros: Fast and Cheap
Impressive speeds
Amazing when in Raid

Cons: Not as amazing when not in Raid config

Other Thoughts: For the money, this is the fastest drive you'll ever need.

Pros: Fast drive. Cheaper than SSD. Using as primary drive on a gaming rig.

Cons: Runs a little warm but expected.

Other Thoughts: HDD companies have poor quality control lately on 500 GB+ 7200 rpm drives. Does not seem to matter which brand. Hoping this drive outlasts the recently deceased drives.

Pros: Very fast and work great in a RAID 10 and a RAID 1 setup. Love it!

Cons: Out of 7 of these drives we have ordered one was defective but the RMA process was simple.

Pros: Almost 2 years old and no problems so far.
Quieter than the fans in my case.
Happy with the I/O performance, aka my games boot faster than with my 7200 RPM drive.

Cons: It seems to run warmer than my older drives, but it's not too hot, and expected for a 10k RPM drive.
Wish the price was lower, but still worth the money if you don't want to have to empty your pockets for a SSD.

Other Thoughts: I would recommend this drive to anyone looking for something faster than a 7200 RPM but cheaper than a SSD.

Pros: Fast and faster in raid 0 when paired with it's own kind. Reliable.

Cons: The adapter card isn't reliable. If you think your drive failed take the hard drive out of the adapter case and test it with the adapter card (that is what failed on both mine). Easy fix cut the adapter shorter so you don't need the adapter card.

Other Thoughts: Western Digital should use better adapter cards or get rid of them all together, because when that goes bad it makes it act like the hard drive is bad which isn't the case. 4 stars only because of the adapter cards going bad.

Pros: Fast, very fast. The next best thing to buying a ridiculously expensive large-sized SSD. 300GB capacity with the speed to make it worth it.

Cons: Hard drive gets bogged down overtime as you abuse it~ but that goes for all hard drives, just that this one felt that it bogged down slightly quicker than it should.

Other Thoughts: Good for a gaming computer, but not as a mass storage drive, as it is only 300GB. Suggested that you get another hard drive for storage and use this one either for booting up windows (if you don't have an SSD) or for your programs.

Pros: Fastest SATAII Mechanical (Non SSD) on the market for the price.

Cons: Western Digital Tech Support! I purchased this drive from Best Buy back in 2008. It failed in late 2009 so I sent it in on WD RMA and received what I thought was a new drive. The drive failed again in July 2011 and I sent it back a second time. It cost me $30+ for shipping from Alaska and they sent it back and this is what they said: "Thank you for contacting Western Digital Customer Service and Support.
My name is Dimmy L.

I apologize for the inconvenience, based on the information gathered from our RMA department, the defective drive was sent back under UPS tracking number [removed] because the bottom serial barcode counterfeit, therefore, we will not send you a replacement drive."

It boggles my mind seeing I received the drive from WD RMA.

Other Thoughts: Two drive failures in 2 1/2 years?? It's fast but it ain't that fast.

Pros: The drive works exactly as expected. Its been over a month of heavy use and no problems so far. Definitely a fast drive, great benchmark ratings.

Cons: none

Other Thoughts: Newegg response time and shipping is awesome as always!

Pros: Very fast drives, especially for a SATA 2 setup

Cons: One of the two drives that I bought for my RAID 1 mirror died.

I had to RMA the broken drive back to Western Digital. Now I'm waiting for the replacement drive to arrive. The standard RMA process takes at least two weeks if you're very responsible about it and move quickly.

Other Thoughts: After this failure, I bought a 256 GB Samsung 470 series solid state drive so that I could get my computer up and running again, without losing the data in my RAID (Windows broke my RAID boot after the drive died).