Can anyone attest to the accuracy of an Azure Migrate Business Case?

Hello!  I've only created a business case in a simple lab environment using 5 on-prem Hyper-V servers. (SmartHotelHost lab from Github)  The business case export explains that I'll be saving over $100K annually once fully migrated into Azure after multiple years.  (It's only 5 servers!)  That said, I've been reluctant to suggest the Business Case tool and steer clients toward the Azure Migrate Assessment and Azure Pricing Calculator which have proven to be reliable tools.

Anyone have any experience with the business case?  Was it accurate?

Thanks a bunch!

Rich