My biggest problem with Fastmail is that they make it extremely difficult for a single person to have an email address with your own domain. IIRC you either have to purchase a family plan or go throw aliases, the latter of which is user unfriendly.
So the only difference now is it's $5/y extra to have the family "container", which lets you create accounts in your own domain rather than having an @fastmail.fm account and aliases. Having that container then also lets you setup multiple accounts, manage them, share folders between users, etc. If you only have 1 account, then yes, it's a bit annoying, but I don't think $5/y is too onerous.
It does for me, catches everything sent to ancell dash ent dot com, which allows me to do the usual "who's selling my email address" trick with customized addresses, like redcross.org.ph@anc... when I sent some money to the Philippine Red Cross.
ancell-ent.com Type=MX TTL=3600 STANDARD_MX (standard email - e.g. user@ancell-ent.com)
*.ancell-ent.com Type=MX TTL=3600 STANDARD_MX (subdomain addressed email - e.g. user@mail.ancell-ent.com)
ancell-ent.com Type=A TTL=3600 STANDARD_WEB (main website - http://ancell-ent.com/)
*.ancell-ent.com Type=A TTL=3600 STANDARD_WEB (subdomain websites - including http://www.ancell-ent.com/)
mail.ancell-ent.com Type=A TTL=3600 STANDARD_MAIL (webmail login - http://mail.ancell-ent.com/)
ancell-ent.com Type=CSV TTL=3600 CSV_DENY_ALL (no email sending machines identify as ancell-ent.com)
ancell-ent.com Type=JABBER TTL=3600 STANDARD_JABBER (standard chat server - chat.messagingengine.com)
wap.ancell-ent.com Type=A TTL=3600 STANDARD_WAP (cellphone WAP service - http://wap.ancell-ent.com/)
ancell-ent.com Type=DKIM TTL=3600 STANDARD_DKIM (dkim key mesmtp._domainkey.ancell-ent.com)
ancell-ent.com Type=AUTOCONFIG TTL=3600 STANDARD_AUTOCONFIG (mail autoconfig)
Ah, maybe you're referring to how this translates to Fastmail mailboxes. Specifically a "virtual domain" concept where aliases are established, and I have both the wildcard * and hga at my domain aliased to hga at fastmail dot fm?
If the above is what you're trying to do, how is it user unfriendly? If not, out of curiosity and maybe a need to do this myself in the future, what are you desiring to do?