I used Iris in industry. When I set up my own practice I chose Taxcalc because Iris/PTP was much too expensive. However, Iris Accounts Production was much more flexible - you could alter /replace every note, hide irrelevant notes, etc. Taxcalc by comparison is more restrictive. However the tax side is fine.
Surely it should have been called the Audit, Governance and Reporting Organisation (AGRO)
My favourite bit so far is that although manual rekeying and "cut and paste" are not allowed, an export and import via csv is specifically allowed.
(1) no-one will change the csv file by opening it in Excel
(2) no-one will upload the same csv file twice
As another commentator said, it's straight out of the Golgafrinchan B Ark...