We use Miralinks to purchase permanent links in our work — it has an extensive database and a unique format that sets it apart from competitors. This is definitely a plus, as you can choose platforms for any niche. However, there is a downside — it takes a lot of time to clean up and compile blacklists to exclude old and unreliable sites. This is unavoidable. The interface is quite user-friendly, and there is a wide filter for various parameters, which significantly eases the search. Customer support regarding refunds and disputed situations responds rather slowly. There are sometimes delays with moderation and appeals — this is a perfectly natural process.