Our GPS (Garmin nüvi 2595LMT A 5 ') goes in and comes out easily but is still well kept.
Although he made did not tie to lock, GPS is in the background and is clamped by the case and should not easily fall. Unless you hold it upside down !! ^^
A small pocket on the front is available but apart papers or a credit card, nothing could go, not very useful ^^!
By cons, you can not put the car charger or the suction cup to the windshield !! But this remains anecdotal !!
I highly recommend this small case Amazon Basics !!