After the "Crucial 256GB CT256V4SSD2" and "OCZ Agility 2 120GB OCZ" were absolutely unfit for my Macbook now I have installed my "Samsung MZ-7PC256B / WW".
I am thrilled write 192 MB / s and 254 MB / s read, could not be better in my device.
A word about the power consumption, Subjectively, I have found no difference in the battery runtime for 2.5 HDD.