I just got one after signing up for a waiting list. It was fast.
My first impression on the landing page (dashboard): Wow, what a clean interface! It feels like purelymail's dashboard but much organised.
Haven't started using it yet but I agreed with @Berenburger it feels complicated on how I should start using it.
It reminds me of
manyme.com (anyone still remember it?) which has similar workflow but this is much cleaner and offers you an inbox with free 500MB. Also manyme does not allow to change my forwarding email which is a bummer!
I sincerely hope Port87 can last and I might even subscribe to one of its package to support them, but for now I'll use it casually.