Hard-drive reliability is subjective to the company and how it operates--and this changes year after year. Like Anti-Virus companies, one drive manufacturer will produce the best of the year, while another will take its place the next year and so on. the good news is, many of them are excellent for the price. I always advise just making sure you have good backups: three drives (two onsite, and one off-site, which is carefully updated every week).