I have two female adult cats. Frankie, 12 years old and Holly, 3 years old.  Both have always had a cat tower.
This is my second one from Wayfair.  
This is truly the best one yet. Frankie immediately
 claimed the second floor condo, while Holly took
 to the top perch.
The pads are nice for my older cat to grip as she is challenged with arthritis in her back from a terrible fall years ago.  Both are enjoying the scratch posts.  Very sturdy.   It looks great !  Love the wood features.   I highly recommend this cat tower.