Hi TomZ,
I tested the Minew gateway over a year ago. When testing it I found the main issue was it would group all messages into one large json message, instead of indivual messages per tag, whilst not a majo issue it was annoying.
With setting it up it is quite easy as Minew has made a stripped down web interface which is easy to navigate.
Another limitation is the on PCB antenna, if the gateway offered better range it would be a better option then say a RPI Zero W but its range was not that great.