This gets a 3 because it didn't last long. ...
This gets a 3 because it didn't last long.  Otherwise I would rate it higher.  I bought it in September of '16 and it's now mid March of '17, so not even a year.  The last one I purchased lasted probably at least 5 years or more, and that is why I purchased the same brand.  I've read some of the recent reviews and the people who gave low reviews all have to do with air leakage.  I will probably buy one more and see if I get lucky.
Rating: 3 stars