Thanks for the insight. It's the only mailer service I've used so far but seems like I gotta do some exploring.
I'm just looking for something that doesn't cost an arm and a leg for the minimal email volume I send, and that has better deliverability than sending myself with a VPS, as there's usually at least one bad actor in any /24 your typical VPS will land in and that punishes your deilverability.
They have the best support I ever encountered, we were having weird delivery issue on some specific clients and they help us debug the whole problem.
They have more than fair pricing and actually do a manual verification when you want to start using them (and not just testing with your own domain).
Their hobbyist tier is 100 mails per month. No credit card required.