How has your experience been using Amazon SES? Any areas where it is lacking?
The main difference is that SES lacks significant tooling. You need to roll your own monitoring, logging and block list maintenance, all of which can be a surprise coming from tools like SendGrid. Once you do all the work though, it’s largely set it and forget it.
I use Mailjet for my personal projects very happily but have never crossed over the free threshold of 6,000 monthly emails.