Fit perfectly into a mid-2012 13-inch MacBook Pro. File read and write performance has substantially improved, and boot time has been reduced by about 25%. The drive is silent and very speedy.
Be advised that you will need a Torx T-6 or Star SD-6 screwdriver, as well as a Phillips #00, to open the back of the Mac and install the SSD.
You'll also need a hard drive enclosure to connect the new SSD to your computer via USB and perform the initial cloning from your current hard drive.
To clone your current hard drive, Disk Utility will not work unless the SSD you're purchasing is as large or larger than your current hard drive. It does not matter how much data is written to your hard drive, only the total size of the drive. Instead, I'd recommend using Carbon Copy Cloner (CCC), which gives a free full-featured 30-day trial. Another advantage of CCC is that it allows you to clone the Mac recovery partition onto your new SSD.