I bought my hard drive roughly six months ago and it has consistently worked perfectly. I've traveled around the world with it, dropped it countless times, and I subject it to rigorously misuse. Yet amazingly it remains reliable. I have not experienced any of the problems the previous reviewer expressed and assume his unit was a rare exception of an otherwise incredibly high quality product. The drive is also made in Japan, which may (or may not, to be fair) contribute to its flawless performance compared to its Chinese counterparts. The drive is compact, durable, and extremely reliable. I am extremely satisfied with mine and I just purchased a second for my other laptop!