When evaluating security solutions, if functionality is equal across all, what would be the leading factor to impact your buying decision?

|| Support ||
The level of support offered by the vendor, including access to customer service and technical support, can be a key consideration. As technology is evolving every day and that includes the danger of cybersecurity, it would be funny if a security hole emerged with a new technology or technique and the company asked for a countermeasures or prevention strategy report by the vendor but the vendor responded slowly which would create a panic among the companies.