Summary: Works as it should, providing USB 3.0 capability to Seagate FreeAgent GoFlex drives. If you already have one of these drives with USB 2.0 base, than this is what you want. If you don't, then you are probably better off getting a good hard drive enclosure and 3.5" SATA drive to fill it. I wish this base also allowed eSata connectivity, but Seagate seems to be ignoring that connection type all together.
Summary: I find Arthur's review to be interesting ... this base is for the Seagate FreeAgent GoFlex (SFG, my abreviation) product so it wasn't designed to be used with a bare hard drive as it appears he has done. I bought the SFG 2tb with USB2 base before the USB3 base became available. It is literally plug and play. The only evidence that it is present is (a) the tray icon and (b) intense periodic backups bring the computer to a standstill for a few seconds.
Summary: I have 3 of these hard drives, and despite what you may have heard about Seagate build quality, these drives have never let me down. My oldest is about 2 years old and I haven't had a single issue. The design is really great (with one caveat, more below) and the fact that the ports are part of a detachable dock means you can upgrade/switch your type of connector (Firewire, Thunderbolt, USB, etc) without having to buy a whole new hard drive.
Summary: I've had good backup service with these Seagate external drives, -I use 2 of these. This one is working perfectly, but it did not come with the cable. I thought when I bought it that I could use the usual USB cable from an earlier drive with it, but this one uses a unique cord that fits onto the entire end of the drive. So be forewarned, -if you don't already have a cord for it, better look around for the price of buying one separately.
Might need a Sata Male to Female Data and Power Combo Extension cable
15 May 2014
Summary: I bought the GoFlex to attach regular 3.5" hard drives, but because it's made for Seagate's own drives, an ordinary drive is somewhat unstable and has recently developed a slight crack in the male jack from it's awkward wobbly mounting. My solution to relieve pressure and make it easier to attach other drives was to buy this $5 extension cable and it works great.
Summary: I used it to clone my MacbookPro's 500GB SSD to a Samsung 1TB SSD which I put on the Seagate adapter. There is some discussion about whether the Seagate adapter can handle large SSDs. It was fine with the Samsung 1TB. When I had cloned it, I put the Samsung in the laptop and the original (a Toshiba) on the sled. Both worked fine with the Seagate adapter.