I build systems and overall would call my hard drive experiences very good. I have had a few fail in less then the current 3 year warranty period but the percentage rate is pretty good. I will say that I primarily use Maxtor and, at least the last time I had to get one replaced, they were the easiest company to do it with. Just got a WD replaced and had to send it to them first. I will say that they returned the replacement with 2 day shipping. However, it took my UPS ground 8 days from Florida to California. Maxtor, as I said the last time I dealt with them at least, took my credit card number and shipped a replacement in two days. Just dropped the bad drive in the box and never saw a charge. Gives you a chance to recover data if the drive is not totally zonked. I think Seagate is better now but I got a DOA drive of theirs and was required to ship it to them before replacement. I think it took 5 or 6 weeks, inexcusable. Had a Quantum a couple of years back also that was new but very quirky. I think I had to ship to them first also but believe the turnaround was reasonable. Just my experiences and I have put in a lot of drives.