I bought a 830 256K and it was delivered yesterday. I installed it in my 3 years old Sony i7 even though it was Sata 2. All I can say is WOW.
Mine came with Norton Ghost, but I had decided to just install from scratch, everything fresh. So I installed a clean copy of WIn 8, then reinstalled all the other apps. MS Office being the major one.
Seeing numbers over 200, which is expected, and Ill upgrade my new 2012 cMBP when I can find another deal on the Samsung drives.
My install on the SOny did use the included spacer.
Hooked up old drive via USB cable, transfered all data. DONE!