We've had this about two weeks and the good news is that my cats love it. The bad news: The unit has totally fallen apart. The black plastic connectors are about as durable as licorice and are already warped. I wish they snapped/locked into place. I connected everything securely (I thought) and hammered all the corners just to make sure. I noticed a lot of positive reviews -- everyone else must have extremely dainty cats! Mine are in the 8-11 lb. range (Read: not portly) and they pretty much ripped it to shreds. Luckily, no one got hurt. I may try gorilla glueing the bits back together.