Reviewers see Ahrefs as a strong SEO research tool built around backlink analysis, keyword research, competitor tracking, site audits, and content discovery. They repeatedly praise the depth, speed, and reliability of its data, especially in Site Explorer and Keywords Explorer, and many use it daily for client work, strategy, and monitoring rankings or technical issues. The main complaint is cost: many say pricing is steep for freelancers, small teams, and smaller agencies, while some also note a learning curve, occasional instability, and a recent pricing policy that pushed one long-time user away.