I am a Fastmail customer. Absolutely horrible customer support but pretty solid email. Do not even think about using the "suit" they offer alongside email.

The rebranding and "revamp" is limited to the logo and colour changes :D everything under the hood is still the same good old OX inferiority. Hell, you may never want to use their webmail either (my 99.9999% mail usage is via IMAP clients). They are fine other than that.

Fastmail is pretty good if their price and offerings are not an overkill for you. You should check Runbox as well - really good.

Simple Login alt: addy.io? Fastmail and Mailbox (auto-deletes in 30 days unless you "touch" it :D) also have disposable email as part of email offerings. Don't know about Runbox.