The best thing about global call forwarding is that it helps save money for all my clients who are in different parts across world, as they only need one number instead multiple numbers like their local area codes etc..
It has helped me with saving costs too! I find nothing at this time which i dislike because everything seems fine so far. If you're looking forward towards cost savings then go ahead otherwise if there's any other benefit just wait till its free or cheap enough before going into contract agreements!! We have been using GCP services since last six months now we haven't experienced anything negative regarding these products hence no complains whatso ever but yes benefits were seen by us immediately when started utilizing them without wasting more time thinking twice.