seems like a great product for a pain that most people have. i don't seen professional investment firms or bulge bracket banks would use this, however; at citi we use factset and capiq and even those services don't reveal everything and have errors sometimes. the analysts, at the end of the day, usually goes through the filings no matter what.
like other comments posted here, professional investors, on the other hand, generally already have another service they pay for, or proprietary data/information (for hedge funds or prop shops at least) that aggregates the specific data they are looking for.
not quite sure what the target audience of this is; if its investors with the intention of condensing data to just q/q and y/y operational performance, then the financial information technology space is already pretty crowded.