It doesn’t come with a 3.5” adapter. It’s a simple package with a CD. Upgrading is simple with the new Macbook Pros. I never use the CDs it comes with since I just format my computer and start from scratch. Most, if not all my important files are in the cloud and can easily be restored when needed.
Overall I’m very pleased with the performance. It’s a huge improvement from the traditional hard drive but… it replaced my old Kingston SSD drive. I don’t see much improvement between the SSD drives. I guess there isn’t much difference between SATAII and SATAIII. My MBP uses SATAIII which is one reason why I upgraded. Another reason is that the Kingston only had 96GB to begin with and it was filling up fast. Here is the benchmark I ran with the the Samsung 830 drive. Unfortunately, I can’t find the benchmark I ran with the Kingston SSD.