I have been using these for years and they work great. I use them to connect four sleeping pads so my wife, two kids, and myself have one large bed to sleep on. They work great. The pads all stay together so you don't wake up in the middle of the night between two pads on the hard ground. They are also strong as I have never had one break on me.
This review was written in the old system and had content requirements that are different than reviews written today.