This is the second one that I have purchased and I can't ever see buying something different. The first one is now 4 years old and I am going to replace the sisal on the poles and move it to my office. It has lasted remarkably well considering that at least 3 of my feline office assistants range in weight from 14 - 17 lbs. Not fat, just BIG! The unit is very study and they give it all kinds of heck on a daily basis. Highly recommend.