Just a note for those that compare FAKOs to FICOs and say that CK is usually close. Walmart TU08 came out today. DW's FICO was 754, her TU on CK was 644. That's just a difference of 110 points.
Starting Score: 504
Current Score: EQ FICO 819, TU08 775, EX "Who Knows?" Quizzle 756
Goal Score: All Scores 760+, Newest goal 800+
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The utility of the ck score really depends on whether its major differences from FICO apply to you. For example, CK counts average age of open accounts, whereas fico counts average age of all posted accounts (including closed). If you have no closed accounts, both will track similarly. If, like me, you have over 20 closed accounts, the difference is significant. Same with inquiries. I had my only TU inquiry fall off yesterday. Today, ck was unchanged, but ck vantage went up 5 points. I'm reasonably sure my fico would bump at least a little going from 1 to 0. My guess is that inquiry penalties depreciate faster on CK than on fico, so I likely saw the benefit of aging inquiry on ck some time ago. My guess is someone with a relatively new profile, a ton of inquiries, no negatives and no closed accounts would see a strong correlation. The rest, not so much.
That being said, CK keeps getting more and more detailed, to the point where it is almost equivalent to a credit report. Also, the vantage is used by a few lenders. I continue to find ck more valuable for tracking my overall credit profile than scorewatch, credit sesame or credit.com
My CK is at 748 and TU08 is at 759. On CK the CK score goes up, the Vantage score goes up and the Insurability score goes down. Makes no rhyme or reason.
Starting Score: 504Current Score: EQ FICO 819, TU08 775, EX "Who Knows?" Quizzle 756
Goal Score: All Scores 760+, Newest goal 800+
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Just for sh!ts and giggles I logged on to credit karma to see if something new posted nearly heart nearly ripped through my chest when I saw 698 staring back at me when I knew I had 755 a month prior. Panicked strickened I paid the dang 19.95 for a transunion report to my relief 760 staring back at me backed by MYFICO- my trusted buddy!! 
so basically, use ck for entertain,ent purposes or to keep track of accounts but don't worry if the numbers look scary. Although, sometimes the score given on ck can be higher than what myfico says. TRUST ONLY MYFICO! 
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