When i bought my PS3 the CFW was on CEX i guess it was Ok but when i converted to DEX it was way better, the mod menus were very stable and they never freeze but when i was on CEX it would freeze my PS3 everytime
I recommend being on DEX also there are way more things,homebrew apps that are compatible on DEX than CEX, Very stable mod menu,Sprx and i felt like i would get ban more often on CEX than i do on DEX.
DEX IS LIFE