As great as these drives are supposed to be, I've had several fail on me recently. Out of the last 8 I've bought for customer laptops, 3 have failed so far within the last month, and this is a serious, catastrophic failure.

This Western Digital is great for a laptop replacement or upgrade. 500gb, full 7,200 RPM, reliable, cheap and power efficient.. You can't ask for much more. You will notice a difference in your laptop's performance if you have a slower drive, and you won't lose battery life either.