I am currently on 3.55 kmeaw, I have been on it forever but have been hearing about rogero and sgk's 4.31 cfws. My question is, is it worth it to upgrade and if so then what is the best and latest cfw that I can upgrade to? Will I lose any features and will I be able to return if I dont like the new firmware? Also, I know waninkoko's cfw used to brick some older ps3s, are these new cfws fully compatible or do I need to check somewhere to see if my ps3 is supported? for reference I have a CECHK01 (phat 80gb).