I think it's worth to leave a review as the platform really deserves it.
The founder is active and helpful, the platform has a polished UI and the UX, documentation is clear and setup is easy if you follow it carefully.
Email is a serious thing, and there are pools of ip, it's true that they care a lot about deliverability and if everything is well managed and planned, it will just work.
If people think to buy, abuse, due to the good limits, then i strongly suggest not even trying, this is not the one for your use cases. For others looking for a reliable emailing platform to send proper marketing emails and transactional emails for you and your client's business (legit and not shady/spammy), then buy NOW, you won't regret