Bests & Worsts Reviews from Amazon

As suspected, interest was high - one of our cats climbs inside any bag/tote/tissue box....the other bumps his head under blankets to lift them up and curl beneath. No hesitation whatsoever - one was in it within seconds. One cat sleeps with his chin on the threshold, the other disappears - very lurky. The whole interior of the cave warms up within a few minutes of one laying inside - so it surprised me to see the "pebble" had grown a second head today...was inevitable I suppose. My cats weigh about 13 pounds apiece and they fit together fine. I decided to get another and will go down one size this time.