This litter tray is very easy to assemble. Instructions include pictures and are very easy and straight forward to follow. Was a little hesitant to purchase as my cats have always used your traditional plain litter tray and I wasnt sure if they would use this. At first they thought it was a new bed contained no litter at the time. The litter tray is quite sturdy once assembled which was another thing I was worried about. The cats have been using this tray so I will be purchasing more. Highly recommend this product and seller Postage was very fast as wellWord of warning though do not over fill the tray which is what my husband did as the litter goes everywhere and you are better off using a clumping litter as their pee also gets trapped in the grated area.