Anyone use Keystone CPA?

[Garrett Wilson]

Does anyone use Keystone CPA for their financial advising and Tax preparation? I am looking to get a real estate tax advisor to ensure I get the best deductions and wanted to see if anyone had any experience working with them.

They charge $5500 for the first years "Tax Savings Plan" and then around $1,000 for following years.  On top of that the annual filing is $1200 for the basic filing and them more for any additional activities. 

Has anyone worked with them and feel like the fees were worth the service you were provided? Online reviews were mixed between one star and five stars (nothing in between).