Webley, the ILS does nothing to prevent the theft of the gun itself from your vehicle.
For that, I have a Console Vault with combo lock in my truck, and portable lockboxes that cable lock to seat frames or trunk hinges if traveling and using rental cars.
As far as Maryland goes, their gun laws are a major reason I have never sought employment in Maryland. Seems to me this is true of those states that I think require such devices, in general (NY, CA, MA...)
The group-think that decides such a lock should be mandatory is a symptom of a greater problem.
And, aside from aesthetics, and added (though minimal) risk with no corresponding gain (for me), I resent the locks because such PC group-think lies at the root of the locks' origins. They symbolize something I detest.