Joined on 01/19/08
A very good buy!

Pros: Huge Capacity, runs VERY cool, power-efficient. My old 7200rpm segate momentus (stock from dell) was windows experience 5.1, this one is 5.7 (that's a big improvement). The old drive got so hot it was pretty painful to use the laptop, the WD is just cool, way cool.
Cons: Can be a little noisy (soft clicks) -- that's a real stretch for a con.
Overall Review: The description says *RETAIL* but new-egg sent me a bare drive, no retail box, no instructions, no software. It's not a problem for me but it was definitely unexpected. For the heat issue alone this upgrade was worth twice the price, but the vast amounts of storage and blazingly fast speed definitely puts this drive in a class by itself.
Take a pass on this.

Pros: Gigabit ethernet, N wireless, and a poor-man's NAS (network attached storage) in one tiny package.
Cons: I've been a fan of linksys for years but this product really disappointed me. If ANYTHING goes wrong during the installation the easylink software stops working and will pretty much never work again. The purchased box came with version .3 of the firmware and every time I tried to upgrade to .7 in the web interface (which wouldn't work with firefox BTW), I got a "update are failed" error. It took a lot of digging on the linksys support site to find a tftp client to flash the box without using the router's web interface. And when I DID, the "upgrade" exposed the hard drive via ftp to the internet. USB drives are fairly slow, you can expect 1.5Megabytes per second. So it's good for serving files (like media) but don't expect to run applications off it.
Overall Review: After you go through the extremely painful setup process (thanks to easylink's failures, lack of firefox support in .3, and the firmware upgrade bug) the box is very similar to other wrt routers, but the setup is painful enough for me to recommend avoiding this product until they get the kinks worked out.
Good server/storage disk

Pros: Runs very cool. With 3 of these and a (hot) Seagate Barracuda (also 1.5tb) in a small ACER Easystore home server the system is reporting a constant 105() operating temperature. Maybe the box is well insulated but I don't notice any clicks on spinup.
Cons: new egg has these mislabled, they're not spinpoints they're ecostars. None really. They're 5800rpm slow but no slower than other 5800rpm drives.
Overall Review: The model number of this drive is for the ecostar line, newegg has the product mis-labeled. I knew this before I bought them (thanks newegg commentors!). Ecostar was a selling point for me, since it's in an always on box (and I'm paying the electric and cooling) I wanted low heat, low power-consumption and these drives deliver. Sustained throughput on a gigabit network going to a 300Mbps wireless is ~20MegaBYTES per second, more than enough to serve media files (direct gigabit to gigabit which I can't test may be faster). So far, no buyer's remorse. The price was right, the performance acceptable, and the heat/energy points are great.