I haven't used them, but I can say from having looked at a bunch of providers circa 2018, the price seems good for email hosting.
I think of $5/month/inbox as being the baseline price, based off of big tech providers like Gmail and Outlook. More raw email providers are maybe $3/m/inbox, but they'll tend to be just email, no office suite or anything.
The Fastmail basic plan paid annually puts it in the expected range, but it has one feature in particular that I don't think is standard: "600+ alias addresses for even more privacy"
I
assume most providers allow inboxless forwarders, but they don't typically market them that way and the expectation is that you to forward
customercare@dicks.us to Doug; you only have to do that once, so you it can be buried really far into the settings. An actual alias feature won't be nearly as buried. If you can create these aliases on different domains than your real inbox, then even better. I would say that's like adding free forwardemail.net functionality to your subscription, minus the jackass admin whom I don't want to trust with my emails. Not as awesome as a simplelogin forwarder however; I don't see any mention of encrypting the messages.
Setting up email isn't that hard, if you don't insist on something fully self hosted then the nerdiest step you'll have to do is updating your DNS.