I'm not defending w3wm I just find it fun and unique. I think some might find it easer to use. GPS location, grid refences is def right over some heads, where they can get words out as they use many of them daily. Yes as many here said, remember the correct spelling, does it have an s at the end or not. They can do that but numbers ...
It also depends on the user at both ends, I have had where the person whom you called have no local knowledge, so getting a junction or that there is church right across from the location will not help the person at the other end of the line. Or the person whom is telling you their location are saying that they are outside the yellow door, forgetting that there is X more in town, but if they just had paid attention to where they walked seconds before or is right behind them, they could have told you something that would have pinpointed it right away.
I have talked to many and also over heard many who are passing a location on. But don't use things that clearly would have helped as they don't see that as part of location and/or direction. One might see names of shops, companies or colour, where the other see hills, bends of the road, lanes etc. Like standing outside the tube station, where there is a name printed above the door, that got a missive artwork, church or some such right next to it, but are explaining to the other person what the shops across the way are selling - you know the cake shop next to the flower shop called Jo's Tulips and Cafe Nero. If only they said Liverpool Street Station or sumsuch.
Along with checking that the Stanstead you entered into your GPS is north of the river Thames, not to the south, and is an airport or rather near. Which a co-worker did and therefore didn't get that flight they were hoping for that day.