Wispy Whiskers is slowly but surely getting to like it.  Very unsure if he could trust it once in place.  A few treats on the different levels encourages him to explore.  Luckily he found litter box.  It was easy enough to put together as long as you followed the diagrams and not get interrupted.  Looks very nice and I can get rid of the ratty looking carpet covered perch he used to look out at the wildlife.