1. This is the slowest SaaS system that I have used. Subjectively, it is far slower than Salesforce.com and far slower than the other dozen or so systems I have run.
2. The custom reporting tool isn't ready for prime time.
3. Did I mention that this is slow?
4. Custom reporting - you can't duplicate columns. It isn't intuitive (from someone who has worked in FRx, Hypeiron Essbase and other systems full time for five years).
Intacct makes me scream and run right to the nearest Microsoft Dynamics Partner.
Full disclosure: I have no relationship wiht Intacct except as a user, and no relationship with any Microsoft Dynamics ecosystem member except as an ex user)