Best digital signature out there, really simple an...

Best digital signature out there, really simple and well done, much more than other more famous brands. Even in the midst of a covid emergency, they were extremely available to verify my identity and allowed me to open my VAT number very quickly, I could not have made a better choice.
Council to clarify the part of the "shop" because when I first came across the site it was not immediately clear to me that it was the product I was looking for and I risked ending up in the hands of other suppliers, whose reviews speak clearly about low efficiency of their systems, as well as having higher costs.