I have been using Topvisor for monitoring website positions in Yandex and Google for several years. It is one of the best tools in its class. The interface is convenient and intuitive, and the upload of query packages is quick. I particularly appreciate the guest links for clients: they can see the positions without registration and without the ability to change anything. The prices are affordable: 80 rubles for 400 queries for two search engines is one of the most budget-friendly offers on the market. The technical support responds quickly and effectively. It would be great to have keyword grouping, period comparison, and competitor analysis. As for downsides, there are occasional small delays on Mondays and sometimes freezes with a large number of projects. But overall, it is an indispensable tool for an SEO specialist.