Being tasked with implementing an ISMS to comply to industry-specific regulations, Instant 27001 has proven to be a great starting point.
We passed the audit with only some observations. The auditor complimented us: all the info was clear, concise and easy to find. Instead of giving him a ton load of documents, we just gave him read-only access to the ISMS space in Confluence!
I would recommend Instant 27001 over any other approach. Congrats for creating such a great product!