SAP works like it was built in the 90s. It's slow as fuck, doesn't have good export capability, the worst user interface I've ever worked with, and is the least flexible ERP system I've ever encountered.
I'd rather work with a custom built ERP in Oracle SQL circa 2000 than I would with SAP - at least then, I could get a clean table export in less than 3 hours. I mean, Nav is shit, but SAP is diarrhea locked behind a paywall.
Sorry, I know there's a big push towards non-US systems right now (which I support), but SAP is not a solution - it's just another way to make your employees hate their job.