It arrived today and as many of the reviews stated, I sank to the floor when sitting in it. I was however expecting and fine with that. I bought extra refill and opened it up to pour it into the Big Joe. 

The problem is that the zipper is broken and I can’t open it. Besides being broken, the zipper is missing that longer metal piece that helps a person to move it back and forth. After spending 30 minutes with long tapered pliers trying to get it open, I got frustrated and gave up. Poor quality control.