Vertical and horizontal options
Cats can have different preferences.
Stability matters
A post that tips easily may be avoided.
Surface materials
Sisal, cardboard, carpet and wood wear differently.
Location affects use
A well-placed scratching surface can be more useful than a more expensive one hidden away.
General product-selection information only. A pet's health, anatomy, mobility, breathing and behaviour can change what equipment is appropriate. Follow product directions and ask a veterinarian or qualified animal-care professional when those issues matter.