I love it when something does exactly what it says
In my opinion, a 3-star rating is for a product that is as listed, 4-stars is better than expected, and 5-stars is highly exceeding.  It fits snugly and won't bump off.  It was very easy to attach the vent hose.  I have weak hands and really struggled with putting the clamp on the hose and then on the machine before this port.  With the port, easy peasy.  I am extremely happy with the materials, the fit, the ease of use.  Bravo.  Can you make an external wired internet connection?? ;)
Rating: 5 stars