I'd buy it if it was my decision

If you can agree on quite a common set of processes to be rolled out worldwide with just some variations e.g. between countries, it's easy as hell to roll out. But of course, if there are a lot of very specific processes that have to be somehow separated from e.g. country to country, it becomes more difficult.

If you follow the SAP standard processes, everything is perfectly fine, but once you'd like to leave the route either to the left or to the right, there are places in the system where adaptation is easily and quickly made, but there are a lot of things that just work the way they work, and even using programming, it sometimes doesn't work out, and you need to go the SAP road using influence ideas and waiting for SAP to hopefully deliver that feature sometime in the future.