I was curious about my chances of getting an O-1 visa to the US, however it was very hard to collect an information and sort out what is important, and what is not. I've used SB Relocate to access a white paper with complete description of this type of visa. It was a good starting point in my research. Wish I found this tool before I've spent several days on reading tons of useless blog posts.
Saves a lot of time on visa research
You need to broaden the amount of data available