Summary: Slow to mount. I had to use the Disk Utility to get it to show up on my Mac desktop (or else I just did wait long enough.) Transfer of large files is fairly slow. But it did back up my whole Mac hard disk.
Summary: I use this mainly for my PS3 and WDTV. It works great on both. The only drawback is that on the WD player is take a while to load the videos. Once loaded everything runs smoothly. It may be the WD play though, cuz i have a 1st gen.
Pros: Durable, Fast Connectivity, Loads games very fast, Quiet, Reliable
Summary: It comes with a USB cable and draws power directly from the USB port. Its about the size of a pack of playing cards - slightly wider and longer but less thick - and about as light. I unpacked, plugged it in - and it was good to go. My XP desktop auto-recognized and set it up in a few seconds. It is pre-formatted as NTFS so you have literally nothing to do except start using it(in my case I use it for backups).
Summary: I'm using this as a backup drive for two laptops while traveling. It's tiny, there's no lame pre-installed software and it's reasonably fast for a 5400 rpm drive. The sleek case is built to be light, not incredibly protective. I'll update sometime with how this thing is dealing with life in a backpack.
Summary: As an external drive it's OK if not a little slow. As a possible replacement drive for your notebook, FORGET IT!. The internal drive is hard wired to be noting but a USB drive and there is no way to use it as a replacement drve (using apps like super-duper on the MAC or Casper XP in windows).