Best Free Plugin for Sendgrid integration

I spent long hours looking for a solution to send emails on my restricted hosting account. Out of despair, I tried all the plugins in the repository that modified the wp_mail() function (incl. plugins with millions of installations) but none of the commercial plugins out there come even closer to what this simple but effective plugin provides! I was able to connect to sendgrid for seconds, just adding api key and sender’s address. Plugin supports multisite (free versions of other commercial plugins lacking this) and had all the options I needed, e.g. not showing the plugin settings on a single instance.