Pros: I replaced my macbook pro's stock hard drive (80GB) with this one and it's been great thus far. Doesn't seem much slower than my original and I LOVE the extra space!

Cons: That it's not 500GB! :)

Overall Review: I had it installed at an Apple-certified local computer retailer (big national computer chain) so that warranty/Apple Care on Macbook Pro wasn't voided--they did a great job ($100) and I didn't have to open up my box or ghost the hard drive.