Just now putting together my rma return for one of these to B&H. My 6th SSD drive and by far the worst. Windows freezes on install, slow speeds on new z77 chipset, sluggish performance, hiccups and glitches, just not what I am used to in SSD. Put my Crucial M4 back in place and smooth sailing.
I seriously doubt you got 6 bad drives... you must have some conflict/issue in your system.
I did a new z77 build with this drive and Win8 boots in 5 seconds... runs crystal smooth.