Do they do a good job of getting into the inbox and staying out of spam? That’s the main reason I stay on gmail, it’s so hard to find a provider with shared IPs that reliable land in the inbox.
I use a wildcard domain for this. Every site gets its own address. Each whatever@ gets a mailbox on the left side of the screen, which you can individual hide or turn off automatic fetching if you want. Keeps things clean and you don't have to worry about spam so much.