I bought this for my dogs, and they simply love it. You can see them running in and out of it all day and even snoozing in it. I leave little treats inside for them so that it keeps their interest levels high. There was a ball attached to one end of the tube however, this has broken quickly - in the span of a few days. My one recommendation would be that they strengthen the grasp of the dangling toy and perhaps add more toys on each end of the tunnel.
