I have a set of photos which make a 360° panorama (on row only), which I took years ago. They have lots of defects: parallax problems with lots of trees, some photos not overlapping more than 10 %, photos taken by hand.
I always use this set to judge new versions, and I can say that I now have a perfect panorama (in all my previous trials, I had a weirdness somewhere...). There are still color/exposure correction problems, but they are known (I think)
I only had to add control point on some nearby trees and at the point where photos don't overlap enough. So, GOOD JOB !