Have some medium washers handy the top perch bolts come though the perch. A third hand is a good idea when attaching the upper house. Bolt is to short. The faux fur is thin but fluffs up after a day or two. still to thin.It is abit wobbly Her Majesty is not bothered by this, adds to the adventure.    Overall this is worth the money. Hiding treats got her to start climbing this at first. Now she is all over it..