Bought this as an experiment at work as reception area not covered by radio receiver panic alarms for technical reasons. Hoped this might provide a working alternative for reception staff. While unbearably loud in the room it is set off in, a short distance away in other parts of the building you could hear nothing at all so effectively useless. I'm sure it works well outdoors but no use inside if any solid doors intervene.
Got this as I use a sit down peddle exercise bike and the floor is tiled. Despite vigorous peddling this mat kept exerciser in place on a smooth floor surface very well. Doesn't look elegant but does the job it is supposed to.