Dear friends, I have strange, I can call it problem, or irritating thing, after I upgrade my MacBook Pro 13.3" , model 7,1 with SSD 40 GB from OWC. I replaced the original 250 GB HDD with this one, and Original one I mounted with Data Doubler from OWC, instead of DVD/CD Rom. So, Installation went so good, I formated SSD to Mac OS Extended (Journaled), before installin from DVD ( Mac OS X 10.6.3 ), Installation went good at all. Later, I installed data doubler from OWC with original HDD shipped with Mac Book Pro ( 250 GB ), also I formatted it after installing in mac, on Mac OS Extended (Journaled). At all, after Installing Mac OS X 10.6.3 and doing update to 10.6.6 , I have almost 25 GB Free on SSD, which is good. Issue is, that from time to time my Mac is lag, like stopped, and after 10-15 sec I am able to move with cursor, or to switch between apps and so on. This is happening randomly. Durring that time i see Marble of Doom ( color ball which is spinning ) ... Does anybody know what can be a problem, as really i was expecting just that my Mac will be faster and so on ( It is faster ofcourse, but this is so irritating ). I attached to this post ( Info about Mac , and S-ATA ). As You can see, in SSD is latest ver. of Firmware which OWC Published.