When I signed up for credit monitoring with EX back in November I opted in for Experian Boost as well as their personal finance tool. I have found the personal finance tool to be pretty decent and helpful for getting a rough snapshot of my monthly CC spend. It isn't the best, but it is free and make pretty graphs. 
I initially decided to remove the boost as I had read a post on here indicating that the accounts reported would essentially alwasy show as 100% utilization. I am at a point where I don't need the padding of extra positive payment history and wouldn't be significantly affected if my score were to drop with the removal. Experian Boost always said it found 5 accounts and was boosting my score, but never indicated how much that "boost" was. I found it interesting that a new credit report and scores were generated with each account removal, I was guessing I wouldn't see the impact of removing the boost until tomorrow.
The results: basically nothing changed 
F8, Auto 8, Bankcard 8, F2, Auto 2, and Bankcard 2 did not change at all. F3 changed and actually showed an increase by REMOVING Experian Boost; my F3 this morning was 693 after removing the "boost" it is 705. So, gained 12 points on a model that is not used by any financial institution I plan on doing business with in the near future, but I'll take any points where I can get them.
With a thick and mature file I don't see Experian Boost to be something that would actually provide a score boost. I may add account backs in the future just to see if there are any changes noticed by that. If I ever keep a vehicle long enough to have the utilization of my installment loans to be paid down to <9%, I would be curious to see if adding a boost would keep me from earning the low installment balance points.
Maybe it's just me, but last year when I first looked into Experian Boost my "Spider Sense" said, "Scam to mine personal data from me". I have yet to seen anything which improves upon that impression or otherwise suggests falling for such a ploy is in anyway beneficial for an individual.
Thanks for reminding me to un-Boost! Your post made me remember that I've been meaning to do that. 
When I signed up for it last year, it 'boosted' my score by 5 points. In the 820s, who cares? Besides, it's more of a hassle than it's worth--for example, it alerts me that there's been no reporting from Waste Management in more than 60 days, and tells me what to do to check into it, blah blah blah. The problem? WM only bills four times a year! So of course there won't be activity within every 60 days.
My bottom line on Boost: it's a nice little twist, but really not worth the bother. It took more effort to set it up than it's been worth using.
When I signed up for it last year, it 'boosted' my score by 5 points. In the 820s, who cares? Besides, it's more of a hassle than it's worth--for example, it alerts me that there's been no reporting from Waste Management in more than 60 days, and tells me what to do to check into it, blah blah blah. The problem? WM only bills four times a year! So of course there won't be activity within every 60 days.
My bottom line on Boost: it's a nice little twist, but really not worth the bother. It took more effort to set it up than it's been worth using.
