The O-1 visa is considered one of the best visas for people who want to work in the United States because it allows individuals with extraordinary ability or achievement in their field to come to the United States to work in their area of expertise. The O-1 visa is available to people who have received national or international recognition for their achievements, and who have been offered a job in the United States that is related to their area of expertise. Some of the advantages of the O-1 visa include the fact that it allows visa holders to work in the United States for an extended period of time, and it allows their spouses and children to come to the United States with them. Additionally, O-1 visa holders may be able to apply for permanent residency in the United States.