I ordered the Slim cover but decided not the open it as realised the free Note cover is far superior, BUT i LOVE the Silicone Grip Cover, it just makes so much sense for a big, thick mobile.
Always been jealous of my wife's ZFlip3 have the ring, straps.
For anyone interested this is a great YouTube review of the various cases, but skip to the Grip Cover.
Samsung Galaxy Z Fold 4: Official Samsung Cases! - YouTube