Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Carbonation

After reading several recommendations I ordered the Ball-Lock Gas Keg Coupler. I had to get a 1/4" to 5/16" hose splicer to connect to my gauge set. It was initially expensive but now that I've used it a few hundred times, it was money well spent. It makes at home carbonation a much simpler task.