Bought one of this a year ago. Works very well in first year. It then started behaving unreliable. 5 out of 10 my Mac could not detect the drive. I tried to contact their technical support, however, Lacie has been merged with Seagate and the tech support site went to nowhere. Fortunately, their customer support was responsive and provided me the tech support contact in Australia.

One of the reasons I bought this was the stylish look that attracted me. I was disappointed straight after took it out from the box. The ugly cables let down the overall look.

There is a loud sound when it starts up. However, it doesn't bother me.

I tested the drives that I have bought & cannot fault them. The Seagate is as a large external HDD should be - plug & play out of the box. Both brands are fast at Read & Write & I will buy either one again. The LaCie Porsche is enclosed in a suburb sturdy case with a large amount of brushed aluminium & if you are going for 'looks' this is the one to buy. It is slightly cheaper as well.
See review above.
Actually I cannot fault either brand and will buy again either one depending on bargains at the time.

Because this power adapter failed, I lost all data on this HD, but fortunately most was backed up. I am not entirely happy with LaCie at this point in time, as it hasn't been as reliable as I would have liked.
Compact size. Great for minimum space issues. I have two (2) of these units.
The power adapter. I had to purchase a new one as the original failed on what appears to be thermal overload, and the computer would lock up. Had to force shutdown and switch off the power to this adapter, then re-boot. After the adapter cooled down, I could then re-boot this external HD, till it went out on thermal overload again.