given their email limits i feel that they are a bit expensive. there are plenty of services for $3-5 per month that have better limits (except the unlimited addresses and domains, that's really good, if you need it). and if i look at their micro plan, 200 incoming mails per day is not enough for me alone given all the mailing lists that i am on, as is a limit of 20 out. that's hardly practical.
a cheaper alternative is purelymail. their advanced pricing charges you per email and for used storage, but 1000/100 emails per day will only cost you $35 a year depending on the sizes of the emails you receive.