This is a great product to use with a 40L+ Exped dry bag. You can fill a sleeping pad with two to three compressions and it's easy to use.
It does not work as well with the smaller exped bags you're better off using your mouth to fill as it will take less time.
My only complaint is that it is possible for the schnozzle tube to get pinched, which ends up restricting airflow into whatever you are
This review was written in the old system and had content requirements that are different than reviews written today.