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Lacie: the worst product and support quality I have experienced in ~30 yrs of computer use (2008-12-21)
The product lost my data after less than 6 months. It said I had a "broken share".
I asked Lacie tech support how to recover my data and some idiot there wrote back with instructions on how to reformat my hard drive to wipe out my data.
I then called Lacie tech support by phone. After >30 min on hold, I talked to a rep who asked me to upload my System Log. I did so later that day and wrote to Lacie asking what the system log revealed and received no response. Instead I was told to erase the "broken share" and establish a new share with the same name. That had no effect. I then asked two more times what the System Log revealed and received no response.
Finally, I was told that it was unfortunate that "my computer suffered data corruption" but it was beyond Lacie tech support's "prerogative and mandate" to help me, despite the product being under warranty. Instead I was instructed to go find a third party data recovery shop and was provided no insight into why this happened and why I should ever trust my data to that drive again.

I have been a computer user for ~30 years and have never received such poor tech support. The product is under warranty and has never been moved or unplugged since it was originally connected. To have it die within 6 months is unacceptable. To have tech support refuse to take responsibility for the company's own products is egregious.

Avoid Lacie products if you have value your data - or you will be sorry! This company does not care whether its products work - they just want your purchase money and will promptly ignore you thereafter!

By the way, Lacie also fails to reveal upfront that the USB port on the back of the product that supports a second hard drive only supports FAT32 format! FAT32 cannot handle drives of the size necessary to backup the BigDisk (i.e. 1 TB).

Will not stream Video to an XBox 360 - Horrible Technical Support (2008-12-08)
I bought this for the sole purpose of streaming media (Music and Video) to an XBox360 over a hardwire gigabit ethernet network. Music streams fine. Video does not work at all. It can't even find video files on the device. The Media Server settings on the device describe otherwise. A support ticket unresolved to the fact that they acknowledge issues with video and the XBox 360. Official response: "I apologize, but I am unable to assist with issues relative to the XBox360. It is very likely that the problem is relative to how picky the 360 is about where it receives video from. Windows Media Center is the only medium by which it is allowed to stream video, and the videos very likely have to be on the computer serving the Media Center service."

So, I can stream video from my non-Windows Media Center Apple Macintosh computer, but not a UPnP-Streaming NAS??? This is an unacceptable response. I refuse to purchase another LaCie product... ever.

Hopefully I saved a few people from making the same mistake as myself.

Don't Do It (2008-11-29)
Died within three months of light usage. Furthermore, customer service, while helpful, was slow and understaffed. I have had poor experience with LaCie in general--4 of the 5 drive I have bought in the last year have died--and I use G-Tech instead.

Frustrating product (2008-11-24)
Slow. I can't use this as a 1TB drive because I can't transfer that quantity of data, it starts slow and slows with time. I purchased this to move a TB of data from one system to another. After a lot of time and hassle it simply did not work. When transfer dropped to below 1mbit, I gave up. I tried plugging into one switch, another switch, tried the USB port.
On the plus side the media server works at least nominally. I suppose this product would work ok with small nightly backups or light media server work.
A lot of people claim network bottlenecks but I finally spent more money for a Thecus 5200n. Excellent, great speed. Did in under a day what this thing failed to do in a week+.
Lot of frustration and waste of time for me. Almost converted to a doorstop. I'll try it as a media server at home I suppose.

NOT VISTA READY (2008-10-24)
At the time of writing this the 2 TB version does not play well with Vista. If you have XP and below you're fine. But Vista is another issue. Perhaps sometime soon they MAY decide to get with the program and do something about it, but as of 10-24-08 Vista compatibility is still only a pipe dream.