Does anyone have experience with the "Allow Subsidiary Hierarchy to be Modified" preference? NetSuite has a long list of "we're not responsible fors" as a warning but would like to hear if anyone's run into issues with the preference or if it went well.

well, it really depends what you need to do. NS does not want to fix issues that may arise because you do not understand the complexity that might be involved. so do tell what you are trying to do, and we can tell you how easy it is - or not - to modify subs hierarchy.

I've used it a half-dozen times and it's worked completely fine. That said, as it happened, I have not ever used it in environments that had existing intercompany elims and/or subs with differing currencies. I have a suspicion in that scenario that at a minimum you'd need to re-run elims for all periods and take a close look at CTA to see if that might get FUBAR'ed by whatever you do. Definitely test heavily in a fresh-ish Sandbox.

Thanks RJMNS. This is a pretty straight forward use case where we have a single sub structure and need to insert a parent/holding company - so I imagine we'd have the least amount of risk.

That scenario is what I've always used it for and I've not had any problems.