Pros: Not a single thing. Stay away from Lacie, you've been warned.
Cons: WARNING: The January 2013 update 184.108.40.206 REMOVES the ability to run this NAS in RAID-10 mode. The update doesn't tell you that at all, only listing "usability improvements and stability enhancements". You can confirm RAID-10 is removed from ALL Lacie products on their FAQ page. Note to Lacie: it is bad business and an affront to your customers to REMOVE critical functionality without proper warning.
Cons: Everything about this NAS is slow and unreliable. I tried to use it as a Time Machine backup server but after only a month the backup DMGs were corrupted. I tried to use it as a regular file server but its performance was incredibly slow. We're talking write speeds of 5MB/s over gig ethernet from the SSD drive of a modern unix machine. The integrated media server is also slow. The software has a ton of really gaping security holes, so don't let it anywhere near the In...
Pros: Raid 5.Quiet. Runs cool. This is not a beginner device, and their tech support assumes you are a novice at most things. I can't complain, I had problems setting it up initially. I popped in 5 1tb drives and set it to Raid5. It built the array, then 10 hours later found a fault issue with ID 03. I replaced it and let it rebuild and didn't loose any data.
Cons: However, Lacie pushed an update that I think p_ssed a lot of people off. I should have known better than to just update right off the cuff and wait till I checked their boards for complaints. As a result, I lost the web file browser function for more than a week. When I contacted their tech support, I was outraged to find you could not roll the update back like a regular bios flash, so I went without being able to do remote access through web. I hope they don't do tha...
Summary: Bought this "thing" when my external raid5 (Venus T5... don't buy) totally puked the stripe so bad I could not recover 2.8TB of media files. Everything was just dandy at first. Then came the update. Not only did it kill my access to managing my content, tech support said the firmware was not reversible and there was no ETA on a fix. It's been over a week now.
Pros: NAS. Raid 5 redundancy. UPNP. In their defense, I have to say "Jon" was very patient, but totally useless.
Cons: I can't tell you how much frustration I am having with this company. If you are totally in Linux of Mac, you will have better luck, but if you are a total win dependent user this is totally ugly.
Summary: I love this drive. It's well designed and was fairly easy to setup. I've configured it to automatically power off and on over weekends. The ability to wake on LAN, among other things, is brilliant. The product works well and is worth every penny.
Pros: Big and fast. Support answered email within an hour- but was could not solve problem.
Cons: Had for my yearbook- yet when Mac upgraded to Lion, it would not work with it. Contacted Lacie- they basically said - too bad. You don't invest in a NAS to have it not be available within 2 years because of a OS upgrade- you support it. Flas a bios or something. Lacie has really get us down on this one.