Using an ultra wide lens is all about controlling distortion. Things on the edges tend to bend and even other places will look a little off. Keeping lines straight is paramount. As long as you are at the same height as things on the edge and the camera is not tilted you can control things. That being said, from the middle left of this frame the lines tilted to the right. This bothered me enough so I used Lightroom to straighten them back up again so everything lined up right. The only thing that bothers me about this image is the space between the first window on the right and the second window, it’s right in the middle of the frame. Other than that I like it.