Hi. I am the Product Manager for RM Unify and is always good to hear a wide range of views about it. There are at least 20 IAMs in the UK education space right now, each providing a slightly different offer. This includes the native solutions from Google and Microsoft. I am sure that for some schools RM Unify might not be the right solution (although I am working on it!).
Every month we see hundreds of thousands of unique users completing millions of sessions through the RM Unify platform. Some of them use RM Unify as a fully automated cloud<>network provisioning tool driven by the MIS. Others use it for a more specific purpose. For a Primary School (<500 pupils) we currently charge £495.