I bought this lens today and tested it during our shopping trip in the city. The camera was my Sony a7III. As you can see in the photos, 14mm can be really extreme and most of these shots could use some heavy dimension correction. I only cropped, rotated and changed some colors here and there. This means, I didn`t fix any dimensions or distortions. Also, most shots were made during walking. No tripod usage today (which is a must, if you want to take some seriouse photos with a lens like this).
The clear advantages are architecture, landscape and anything in tight rooms. You can get really close with the lens but it looks too wild in any kind of macro photo.