Didn't review all materials provided to them, left off important part of company valuation which was highlighted in financial statements and cover letter to them(debt carried on balance sheet). Took a long time to complete simple valuation of a business and then left out key component. Added significant costs to total legal bill(thousands) due to their ommission. Sloppy work, not very thorough, charged for a thorough study, but just provided boiler plate valuation of business.