Summary: You need this NIC in your system if you stream media via Windows Homegroup. For the price, they're practically giving it away. I've never had an issue with it and have installed one in every PC build I've ever done.
Summary: Did I really need this? Probably not. It's nice to have the best NIC you can get though, and it will be good for many years. There aren't too many ways to benchmark performance on a single machine though, tests that aren't dependent on your Internet connection which is orders of magnitude lower than gigabit speeds. I tried a TCP loopback test, time to transfer 10 GB via loopback.
Pros: Probably the best gigabit NIC you can buy, Offloads network overhead from the CPU, Even has its own BIOS where settings can be altered, Extensive features
Cons: You might not really need it, Expensive for a NIC
Summary: Not the Low Profile Bracket version. The PWLA8391GTLBLK product is EOL and NCIX doesn't carry the correct version of it. I guess they're just getting rid of what stock they have. It works great otherwise. I didn't need two of the same since I purchased the same product under a different SKU, so I got a refund no problem.
Pros: It works great, drivers for Windows work great
Cons: EOL product and NCIX doesn't carry the Low Profile Bracket version of it. Same exact product as SKU 15706
Summary: My onboard RealTEK died 3 weeks after buying my mobo. I did not want the downtime associated with the an RMA. I bought this with a PM for $28. It works a little faster. I'm getting 1 or 2 MB/s greater than my RealTEK onboard NIC.
Pros: It works. It's compatible with Ubuntu 10.10 and 11.04 out of the box.
Cons: It failed to open my case and install itself
Summary: I didn't buy this one at NCIX as I needed it immediately. When I purchased it, I didn't even realize it was low profile, thank god I had an old 3com Ethernet card that had the same layout but full size. The worst about this card was that the bracket wasn't hold in place with screws but with hard metal plied into screw holes on the PCB, making it a pain to remove it without breaking the whole thing. windows 7 recognized the card immediately and installed it just fine.
Pros: Easy of installation, No manual installation of drivers needed
Summary: Buyer beware - The product comes with a full sized PCI bracket. No low profile bracket was included. When I e-mail my rep about it, he said "Looks like the OEM version do not come with low profile bracket." Good Intel network card. But not really low profile.
Pros: Intel Gigabyte network card. Does anything more need to be said?