Picked up 2 Samsungs. Packaging was fine, though I've never had any complaints about it in the past, nor have I had any DOA's from them. Already owned one of the WD 640's. All drives are used for storage, so speed isn't of any vital importance, but mass transferring files around, I don't notice any difference between the WD or Samsungs. Both are very quiet as well.
Anectdotal accounts of hard drive failures are pretty worthless. It doesn't matter what drive you look at, someone has had a failure and will post about how they swear off never buying a drive from said manufacturer again. There have been a few legitimately bad models in the past, (many old Maxtors, IBM 75GXP come to mind) but in recent years pretty much all drives are highly reliable and you shouldn't really fear for the reliability of any brand.
Anectdotal accounts of hard drive failures are pretty worthless. It doesn't matter what drive you look at, someone has had a failure and will post about how they swear off never buying a drive from said manufacturer again. There have been a few legitimately bad models in the past, (many old Maxtors, IBM 75GXP come to mind) but in recent years pretty much all drives are highly reliable and you shouldn't really fear for the reliability of any brand.