If you already have a Xbox/PlayStation/Switch controller, you can also use that. There are very cheap mounts you can buy for each of these controllers for ~$10 USD that will allow you to hook up to your phone seated on top of the controller.

It’s not nearly as comfortable as this is (though you could say it is because the controller, itself feels better in the hands, but I’m talking viewing angle) but it’s a lot cheaper and doesn’t require buying a new, dedicated controller.

Not knocking your suggestion, OP. Just providing a secondary alternative too.